A '''ratio''' is the amount of one quantity compared to another quantity, or, in simpler terms, one quantity divided by another. Ratios are written with a colon (the : symbol).
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A '''ratio''' is the amount of one quantity compared to another quantity, or, in simpler terms, one quantity [[division|divided]] by another. Ratios are written with a colon (the : symbol).
When two ratios are equivalent, they are called a ''[[proportion]]''.
When two ratios are equivalent, they are called a ''[[proportion]]''.