Question

A number is first decreased by 40% and then again decreased by 60%. Find the percentage increase or decrease on the whole.

Answer 1

Let the number be 100.

Decrease = 40%

`100 xx 40/100 = 40`

100 - 40 = 60

Second No = `100 xx 60/100 = 60`

Again decrease = 60%

Second No = `60 xx 40/100`

= 24

Total decrease = 100 - 24 = 76

Percentage decrease = `76/100 xx 100`

= 76%