#### Answer

A ratio is a single comparison. A proportion is a statement that two ratios are equal.

#### Work Step by Step

A ratio compares two similar quantities. They are achieved by dividing one quantity by the other quantity.
For example, the ratio of 10 to 5 is:
10 $\div$ 5 = $\frac{10}{5}$
10:5=2:1
A proportion is a statement that two ratios are equal. For example:
10:5=2:1
$\frac{10}{5}$=$\frac{2}{1}$