**What is the
ratio of squares to triangles?**

We use ratios
to make comparisons between two things. When we express ratios in words, we
use the word "to" -- we say "the ratio of something to something else" --
for example, the ratio of squares to triangles in the illustration below.
Ratios can be written in several different ways.

Click
on each word below to see the ratio of squares to triangles expressed in each
way.

Multiplying
or dividing each term by the same nonzero number will give an equal ratio.
For example, the ratio 2:4 is equal to the ratio 1:2. To tell if two ratios
are equal, use a calculator and divide. If the division gives the same answer
for both ratios, then they are equal.