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Math Small Group RATIOS Write a ratio with a fraction bar AND as a decimal for each comparison: 1. Blue triangles to red triangles PROPORTIONS Definition: A PROPORTION is an equation stating that two ratios are equal. It can be written in two different ways: a/b = c/d or a:b = c:d You can determine whether ratios form a proportion using a common denominator. Let’s look: 4/5 and 20/25 SOLVING PROPORTIONS You can use the means-extremes property to solve for a missing term, also. Let’s look: 8/6 = 4/n