# 30 is 15% of what number?

##### 2 Answers

#### Answer:

#### Explanation:

Let

Then,

#### Answer:

A lot of detail given in the explanation so that you can see where everything comes from.

30 is 15% of 200

#### Explanation:

You can think of % as a sort of unit of measurement but one that is worth

So

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Let the unknown value be

Then 15% of

In mathematics the of is rather like multiply, so we have:

We need to find the value of

Multiply both sides by