Question

15% of 80 is 60% of what number?

Answer 1

Let x be the required number.

`15\text{ \% of 80 =}60\text{ \% of x}`

`15\text{ \% }*\text{ 80 =}60\text{ \% }*\text{ x}`

`(15)/(100)\text{ }*\text{ 80 =}(60)/(100)\text{ }*\text{ x}`

Using the cross-product method, we get

`(15*80)/(100)*(100)/(60)=x`
`x=20`

Hence 15% of 80 is 60% of 20.

The answer is 20.