Question

What is the number, if k% of it is 2a?

Answer 1

x =
`(200\ *\ a)/(k)`.

Explanation:

Given : if k% of it is 2a.

To find : What is the number.

Solution : We have given k% of a number is 2a

Let the number is x

Then ,

According to question

k% of x = 2a .

`(k)/(100) * x` = 2a.

On multiplying by 100 both side .

k * x = 2a * 100.

On dividing by k both side.

x = 2a *
`(100)/(k)`.

x =
`(200\ *\ a)/(k)`.

Therefore, x =
`(200\ *\ a)/(k)`.

Answer 2

Let's the whole number be x, that is 100% and 2a is k%.This means that
`(x)/(2a) = (100)/(k)`, from where


`x= (200a)/(k)`.