Question

Question #bf352

Answer 1

`50`

Explanation:

We're looking for number `x`, where `90%` of `x` is `45`. Thus we can make this equation:

`x * 90% = 45`

aka

`x*9/10=45`

If we multiply the entire equation by `10` and then divide everything by `9` (or multiply everything by `10/9`), we can isolate `x` on the left side and find its value:

`x*9/10 *10/9=45*10/9`

`x = 450/9 = 50`

So, `90%` of `50` is `45`