Percentage-% Change YouTube Lecture Handouts for PAR

Doorsteptutor material for UGC is prepared by world's top subject experts: Get detailed illustrated notes covering entire syllabus: point-by-point for high retention.

Download PDF of This Page (Size: 206K)

Get video tutorial on:

Watch Video Lecture on YouTube: Percent Change Problems (Aptitude): 15 Sec Shortcut Tricks (Marks, Population, Area)

Percent Change Problems (Aptitude): 15 Sec Shortcut Tricks (Marks, Population, Area)

Loading Video
Watch this video on YouTube
Image of Features of Percent

Image of Features of Percent

Image of Surface Area To Volume Ration

Image of Surface Area to Volume Ration

If the Sides of a Cube is Increased by 100%. Find the % Change in Its Area. What About Volume?

500%, 700%

If the Base Radius of a Right Circular Cylinder is Increased by 15%, and Its Height is Reduced by 20%, Find the Percentage Change in Its Volume


Krishna’S Salary is 20 % Less Than Radha. By What % is Radha’S Salary More Than Krishna?


Which Would Produce Greater Net Income on Gross of 2000? 10% Tax over 200 Rs 12% Tax over 400 Rs

20, 32

A Labour Works 60 Hr. Per Week and He Earns Rs. 2400. If His Per Hour Salary is Increased by 16 % and Hours Reduced by 20%. Find the % Change in His Income

928, 7.2%

If the Numerator of a Fraction is Increased by 200% and the Denominator is Increased by 360%, the Resultant Fraction is 5/12. What Was the Original Fraction?


If the Income Tax Were to be Increased by 19% then Net Income is Reduced by 1%. Find the Current Rate of Income Tax


The Population of a Village is 9600. If the Males and Females Are Increased by 8% and 5%, then Population Will Become 10,272 After 1 Year. Find the Number of Males at Present

10272-10080=192, m = 64, 100m=6400

In a Town, the Population Was 8000. In One Year, Male Population Increased by 10% and Female Population Increased by 8% but the Total Population Increased by 9%. The Number of Males in the Town Was?


When a Student Scores 30% Marks then He Fails by 5 Marks. However, when He Score 40% Marks then He Gets 10 More Than Passing Marks. Find Maximum Marks. What About Passing %?

150, 33.3%

Ice of rice is 20% the price of the wheat. If the price of wheat is increased by 20% then, find the % reduction in consumption of rice, to keep the expenditure same.

A company allows 7% commission on total sales of salesman. However, if the salesman was appointed on a fix salary of Rs. 3000, then he gets 4% commission on the sales more than Rs. 10000. If a salesman would receive Rs. 800 more in second condition then the first condition, then find his total sales?

Developed by: