Math Percentage Average Problem

The Math Percentage Average Problem is as follows :


I scored 80 marks in my first internal maths paper. By how much percent should I improve my marks in the second internal in order to get a average of 90 in maths ?

Aptitude Problems Solved

Aptitude Problems Solved


There are two internals. First internal I got 80 marks. Say my marks in the 2nd internal are ‘x’.

Given that I want 90 as my average, then

90 = (80 +x)/2

Solving for x, you will get x = 100.

So I need to increase my marks by 20.

Since 20 is 25% of 80 marks, the answer is 25% :) :)

If you have a doubt, you can post it here and Ill answer it  😉


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