# How to Express One Number as a Fraction of Another Number (Mathematics Lesson)

# One Number as a Fraction of Another Number

One number can be expressed as a fraction of another number.Imagine there were 5 shapes (3 squares and 2 triangles). To find what fraction of the shapes are squares, you would write 3 out of 5 as a fraction:

# How to Write One Number as a Fraction of Another Number

Writing one number as a fraction of another is easy. Write the first number on top of a fraction, and the second number on the bottom of the fraction.#### An Example Question

What is 45 out of 60 as a fraction?Step 1

Step 2

Step 3

Simplify the fraction by dividing the top and bottom numbers by their greatest common factor (which is 15).

45 ÷ 15 = 3

60 ÷ 15 = 4

45 ÷ 15 = 3

60 ÷ 15 = 4

This is 45 out of 60 expressed as a fraction.

The slider below shows another example of expressing one number as a fraction of another number:

##### Interactive Test

**show**

Here's a second test on finding one number as a fraction of another.

Here's a third test on finding one number as a fraction of another.

##### Note

# What Is a Fraction?

A fraction is a part of a whole number.Fractions consist of a numerator and a denominator.

There are three different types of fractions: