# 10.5% of what number is 420?

##### 2 Answers

May 9, 2017

Number is 4000.

#### Explanation:

Let the number be

May 9, 2017

**4000** is

#### Explanation:

We know that

We know that

So now we can equate the two lines above by following what we have written:

Then cross multiply:

To check this answer we can calculate

which is reasonably close to the