Question

A number when decreased by 20% gives 80. Find the number

Answer 1

Let the number be x.

Given that when it is increased by 20% we get 80.

`x - 20/100 xx x` = 80

`(100x - 20x)/100` = 80

`(80x)/100` = 80

⇒ x = `(80 xx 100)/80`

x = 100