The ratio between two numbers is the same as the quotient of the fraction that includes the two numbers. In general, it’s expressed like this:

Theory

The ratio between the numbers $a$ and $b$ is $\frac{a}{b}$. The first number is the numerator and the second number is the denominator.

Here are a few examples.

Example 1

The ratio between $9$ and $36$ is

$$\frac{9}{36}=\frac{9\xf79}{36\xf79}=\frac{1}{4}=0.25.$$ |

Example 2

The ratio between 36 and 9 is

$$\frac{36}{9}=\frac{4\cdot 9}{9}=\frac{4}{1}=4.$$ |