AI Math SolverA ratio calculator simplifies, scales, and compares ratios. Enter two or more values to reduce a ratio to its simplest form or solve a missing term in a proportion.
A ratio expresses the relative size of two or more values. Part-to-part ratios compare groups to each other (3 cats to 2 dogs), while part-to-whole ratios compare one group to the total.
Two ratios form a proportion when they are equivalent, like 1/2 = 3/6. Cross-multiplying — a × d = b × c — lets you solve for any one missing value when the other three are known.
A ratio compares two quantities, written as a:b or a/b. To simplify, divide both sides by their greatest common divisor — for example, 12:8 simplifies to 3:2.
To convert a ratio a:b into a fraction, write it as a/b. The ratio calculator also solves for a missing value in a proportion such as a/b = c/d.