Question

a number is first increased by 20% and then decreases by 15% find the net increase or decrease at precent

Answer 1

let d number be 'x'

it's increased by 20% first , the new value will be = X+20%of X= 1.2X

then it's decreased by 15% , the resulting value will be = 1.2X - 15% of 1.2X
= 1.2X - 0.15* 1.2X
= 1.2X - 0.18X
= 1.02X
= X + 2% of X

so the net increase is 2%