Question

Anumber isfirst increased by 20% and the resulting no.is then decreased by 10%.find the overall changein the no. as percent.

Answer 1

Let the number =100
increase=20%
=100×20÷100
=20
new number = 120
Decrease = 10%
Decrease= 120×10÷100
=12
So, New Number = 120-12= 108
Increase= 108-100=8
increase %= 8÷100×100= 8%