Question

90 is 1/10 of what?

Answer 1

90 is 1/10 of 900.

Explanation:

Let's call the "what" we are looking for `w`.

In math the term "of" means to multiply or times.

And, the term "is" is the same as equals or "=".

We can therefore rewrite this problem as:

`90 = 1/10 xx w` and solve for `w`

To solve for `w` multiple each side of the equation by `10` to isolate `w` and keep the equation we have written balanced:

`10 xx 90 = 10 xx 1/10 xx w`

`900 = 10/10 xx w`

`900 = 1 xx w`

`900 = w`