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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.

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As a fraction- 3/4

Using the word "to"-
3 to 4

Using a colon-
3:4
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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.
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