# What is the product of 21% and some number?

##### 1 Answer

#### Explanation:

The first step is figuring out what 21% is as a number. Well, 21% means 21 parts out of a 100 - which can be expressed as the fraction

Next, we interpret "the product of 21% and some number". What is some number? The answer is in the question! Some number is any number - a decimal, fraction, number, square root, etc, etc. To represent "some number" in math terms, we use a letter called a *variable*. This variable just stands for some number - it can be anything you want it to be. Usually, variables are something like

Now, what does "product" mean? Multiplication! It's that easy. So the product of 21% (