Ratios and Equivalent Ratios

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

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How do you write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 3:2), as a fraction (e.g., 3/2), or with the word 'to' (e.g., 3 to 2).

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What is an equivalent ratio?

Back

Equivalent ratios are ratios that express the same relationship between two quantities, even if the numbers are different.

Front

If a recipe calls for 2 cups of flour and 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.

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How can you find equivalent ratios?

Back

You can find equivalent ratios by multiplying or dividing both terms of the ratio by the same number.

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What is the ratio of red toy cars to all toy cars if there are 2 black, 3 red, and 5 white toy cars?

Back

The ratio of red toy cars to all toy cars is 3:10.

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In a class of 20 students, if 8 are boys, what is the ratio of boys to girls?

Back

The ratio of boys to girls is 8:12, which simplifies to 2:3.

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What is the ratio of 4 meatballs to 1 cup of sauce?

Back

The ratio is 4:1.

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If 15 dollars buy 5 pairs of socks, how much does 1 pair cost?

Back

1 pair costs 3 dollars.

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Are the ratios 15:5 and 25:10 equivalent?

Back

Yes, both ratios simplify to 3:1.