Formulae on Arithmetic


A ratio is a comparison of two numbers. We generally separate the two numbers in the ratio with a colon (:). Suppose we want to write the ratio of 8 and 12.

To compare ratios, write them as fractions. The ratios are equal if they are equal when written as fractions.

Remember to be careful! Order matters! A ratio of 1:7 is not the same as a ratio of 7:1.

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