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Standard practice

Equivalent ratios are the same comparison at a different size.

Equivalent ratios
raisinspeanuts
25
8?

Mateo uses 2 cups of raisins for every 5 cups of peanuts at the school garden. The same relationship has to hold for a larger amount.

Multiplying both parts by the same number does not change how the quantities compare. Adding the same number usually does change the comparison, because the smaller part grows by a larger percent than the larger part.

Problem 1 of 9. Activate, study a model, try guided items, work independently, apply, and reflect.

What is 2 × 4?

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