Percentage calculation on population Shortcut Tricks

Shortcut Tricks are very important things in competitive exam. Time is the main factor in competitive exams. If you know how to manage time then you will surely do great in your exam. Most of us miss this thing. Here in this page we give few examples on Percentage calculation on population shortcut tricks. These shortcut tricks cover all sorts of tricks on Percentage calculation on population. Visitors please read carefully all shortcut examples. These examples here will help you to better understand shortcut tricks on percentage calculation on population.

First of all do a practice set on math of any exam. Then find out twenty math problems related to this topic and write those on a paper. Do first ten maths using basic formula of this math topic. You also need to keep track of timing. Write down the time taken by you to solve those questions. Now go through our page for percentage calculation on population shortcut trick. After finishing this do remaining questions using Percentage calculation on population shortcut tricks. Again keep track of Timing. The timing will be surely improved this time. But this is not all you need. You need to practice more to improve your timing more.

Few Important things to Remember

We all know that the most important thing in competitive exams is Mathematics. It doesn’t mean that other topics are not so important. But only math portion can leads you to a good score. Only practice and practice can give you a good score. You should do your math problems within time with correctness, and only shortcut tricks can give you that success. But it doesn’t mean that without using shortcut tricks you can’t do any math problems. You may do math problems within time without using any shortcut tricks. You may have that potential.

But, so many other people may not do the same. Here we prepared percentage calculation on population shortcut tricks for those people. Here in this page we try to put all types of shortcut tricks on Percentage calculation on population. But we may miss few of them. If you know anything else rather than this please do share with us. Your help will help others.

Percentage calculation on population

Percentage is a very important chapter and it uses most chapters for calculation.Shortcut Tricks is based on, to find the population of a particular town,city in increased and decreased order that is obtain in this type of questions.

we go through the shortcut tricks. This type of problem are given in Quantitative Aptitude which is a very essential paper in banking exam.Under below given some more example for your better practice.

when we say 100 percent in mathematical notation we write 100% so, 35 % means 35 per 100 and 65% means 65 per 100 it is a proportion per hundred and it is used to find marks percentage of a student, profit percent or loss percent of a particular product.

It is also used in find out the depreciation at the rate percent per annul or population of a particular city or town where due to some reason rate of population increases or decreases.

we can expressed ration number as percent, Here is some different percent related problems are given with shortcut tricks below.

Example #1 – Percentage calculation on population

The population of a village is 2500. It decreases by 4% in the first year and increases by 3% in the second year. What is the population at the end of two years?

2472

2500

2272

2043

Show AnswerShow How to SolveShow Shortcut TricksOpen Rough Workspace

Answer: Option (A)

How to Solve First year decreases by 4% = 2500 x 96 /100 = 2400. Second year increases by 3% = 2400 x 103 / 100 = 2472.

Shortcut Tricks 2500 x 96 x 103 / 100 x 100 = 2472.

Rough Workspace

Example #2 – Percentage calculation on population

The population of a city is 175000. In the first year it decreases by 6% and in the second year it increases by 8%. What would be the population of the city at present?

16110

16890

175000

177660

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (D)

How to Solve 175000 x 94 x 108 / 100 x 100 = 177660.

Rough Workspace

Example #3 – Percentage calculation on population

The population of a town has rapidly increases by 20% every year. If the population of the town in 2015 was 600000, then what would be it’s population in 2018?

952677

999999

1036800

1256436

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (C)

How to Solve Population in that town on 2018 will be 600000 x 120 x 120 x 120 / 100 x 100 x 100 = 1036800.

Rough Workspace

Example #4 – Percentage calculation on population

In a town, the present population is 52500. If it is decreased by 20% per year, then what would be the population of the town after 2 years?

30550

33600

35750

39260

Show AnswerShow How to SolveShow Shortcut TricksOpen Rough Workspace

Answer: Option (B)

How to Solve We know, Population after n year = P(1 – R/100)^{n} So, Here P = 52500 R = 20% ( decreased ) n = 2 years.

Population after 2 years 52500 x (1 – 20/100)^{2} or, 52500 x (4/5)^{2} or, 52500 x 0.64 therefore, 33600

Shortcut Tricks = 52500 x 80/100 x 80/100 = 33600.

Rough Workspace

Example #5 – Percentage calculation on population

The population of a city was 24000 two years ago. Population decreases every year at the rate of 5%. Find the present population of the city.

19490

21000

21660

22750

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (C)

How to Solve Present population of that city is 24000 x ( 1 – 5% )^{2} or, 24000 x ( 1 – 5 / 100 )^{2} or, 24000 x ( 19 / 20 x 19 / 20 ) therefore, 21660.

Rough Workspace

Example #6 – Percentage calculation on population

The population in Pune city was 150000 three years ago. If it increased by 4%, 5% and 6% respectively in the last three years. Find the present population of the Pune city?

173628

183344

193543

203457

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (A)

How to Solve Here population increased by continuous three years respectively, So Present population is the city is = 150000 x (1 + 4 / 100 ) x ( 1 + 5 / 100 ) x ( 1 + 6 / 100 ) = 150000 x 104 / 100 x 105 / 100 x 106 / 100 So, 150000 x 52 x 21 x 106 / 50 x 20 x 100 = 173628.

Rough Workspace

Example #7 – Percentage calculation on population

The population of a town increased by annually 6%. If it’s population in 2016 is 1356800. Then, what would be it’s population in 2017?

1438208

1367346

1276854

1184567

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (A)

How to Solve 1356800 x 106 / 100 = 1438208.

Rough Workspace

Example #8 – Percentage calculation on population

60% of the population of a city are men and 15% are women. If the number of children are 20000, then how many men’s are their in the city?

43005

46500

48000

50000

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (C)

How to Solve 25% = 20000 60% = 20000 x 60 / 25 = 48000.

Rough Workspace

Example #9

The total population of a village is 6000. The number of males and females increases by 10% and 20% respectively and consequently the population of the village becomes 7500. What was the number of males in the village?

1050

1200

1350

1500

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (D)

How to Solve The total % increased population = 7500 – 6000 x 100 / 6000 = 1500 x 100 / 6000 = 25% By allegation method Male Female +10 +20

+25

5 15

Male population before increment = 6000 x 5 / 20 = 1500

Rough Workspace

Example #10

The population of a town is 56600. If on the 1st year it is decreased by 10% and 2nd year it is increased by 20%. What would be the population of that city after 2 years?

60337

61128

63874

67234

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (B)

How to Solve 56600 x 90 x 120 / 100 x 100 = 61128 So, after 2 years the population of that city would be 61128.

Rough Workspace

Example #11

The population of a city increases by 10% annually. If its population in 2017 was 11979, then what it was in 2014?

8554

9000

9584

10452

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (B)

How to Solve We need to find the population of city 3 years back, and also the population of a city increases by 10% annually. So, In 2014 the population of the city was 11979 / (1 + 10%)^{3} or, 11979 / ( 11 / 10 x 11 / 10 x 11 / 10 ) therefore, 9000

Rough Workspace

Example #12

If in a city every year population is decreased by 6%. What would be after 2 years of this town’s population while it’s present population is 65000.

50345

55783

56232

57434

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (D)

How to Solve 65000 x 94 x 94 / 100 x 100 = 57434.

Rough Workspace

Example #13

The population of a city has increased continually from 171000 to 256500 in a decades. Find the average percentage increases of that city yearly.

5%

10%

25%

50%

Show AnswerShow How to SolveOpen Rough Workspace

Answer: Option (A)

How to Solve ( 256500 – 171000 ) = 85500. % = 85500 x 100 / 171000 = 50%.

Average is (50 / 10)% = 5%

Rough Workspace

Percentage calculation on population Shortcut Tricks

So, here we provide few shortcut tricks on this topic. Please visit this page to get updates on more Math Shortcut Tricks. You can also like our facebook page to get updates.

And also if you have any question regarding this topic then please do comment on below section. You can also send us message on facebook.

Eg:11 uses formula for percentage increase in population n years ago. but while doing calculation i can see that formula for population after n years is used…

Please solve my this question:- A. The population of a city increases 15% annually. If the present population is 20,700 , find the population an year ago..

15 percent means 3/20 if in one year it increases from 20 to 23 the present pop. is given as 20700 equate this given population with our present ratio that is 23=20700 1= 20700/23= 900 so,pop. one year ago is= 20*900 =18000

Hello, Example #9 I understood the solution which is given. But, when i’m trying to solve it using equation method the answer obtained is different something in negatives. Could anyone of you explain why is it happening. Thank You.

If you have any questions or suggestions then please feel free to ask us. You can either comment on the section above or mail us in our e-mail id. One of our expert team member will respond to your question with in 24 hours. You can also Like our Facebook page to get updated on new topics and can participate in online quiz.

Disclaimer:

All contents of this website is fully owned by Math-Shortcut-Tricks.com. Any means of republish its content is strictly prohibited.
We at Math-Shortcut-Tricks.com are always try to put accurate data, but few pages of the site may contain some incorrect data in it. We do not assume any liability or responsibility for any errors or mistakes in those pages. Visitors are requested to check correctness of a page by their own.

nice

super

super trick

this is really help me

Sir can u please xplain que no.6 m not getting it

same here please explain

6,8,10

Eg:11 uses formula for percentage increase in population n years ago. but while doing calculation i can see that formula for population after n years is used…

nice

Please solve my this question:-

A. The population of a city increases 15% annually. If the present population is 20,700 , find the population an year ago..

180000

15 percent means 3/20

if in one year it increases from 20 to 23 the present pop. is given as 20700

equate this given population with our present ratio that is 23=20700

1= 20700/23= 900

so,pop. one year ago is= 20*900

=18000

Madam/Sir,

Can you pl. explain elaborately the Example #9

Hello,

Example #9

I understood the solution which is given. But, when i’m trying to solve it using equation method the answer obtained is different something in negatives. Could anyone of you explain why is it happening.

Thank You.