Math, asked by AbdullahShah, 1 year ago

a number is increased by 20% and the increased number is decreased by 20%.find the net increase or decrease per cent..
its answer is 4% decrease how?
plz help me

Answers

Answered by WhiteShadow
2
Let the number be 100
therefore, no. when increased by 20% becomes 100+20/100*100=120
and 120 when decreased by 20% becomes
120-20/100*120= 96
hence net decrease = (100-96)%=4%
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