Question

How to calculate amount which is increased bye some percentage?

Answer 1

First: work out the difference (increase) between the two numbers you are comparing.

Increase = New Number - Original Number

Then:  divide the increase by the original number and multiply the answer by 100.

% increase = Increase ÷ Original Number × 100.

If your answer is a negative number then this is a percentage decrease.
I HOPE IT HELPS YOU :)

Answer 2

it is easy and sbortest....