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Example: The ratio of 6 to 3 is6 ÷ 3 = 6/3 = 6 : 3 = 2

Definition:A proportion is a statement of the equality of two ratios.

Example: 6 : 3 = 2 : 1 or 6 / 3 = 2 / 1or62

- = -

31

are ways to write the proportion expressed as: 6 is to 3 as 2 is to 1