Ratio, Fraction, Decimal, and Percentage

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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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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you express a ratio?

Back

A ratio can be expressed in three ways: using a colon (e.g., 4:5), as a fraction (e.g., 4/5), or in words (e.g., '4 to 5').

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a fraction?

Back

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CCSS.3.NF.A.1

CCSS.3.NF.A.2B

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How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator.

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CCSS.7.NS.A.2D

CCSS.8.NS.A.1

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What is a decimal?

Back

A decimal is a way of expressing numbers that are not whole, using a point to separate the whole number part from the fractional part.

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How do you convert a decimal to a percentage?

Back

To convert a decimal to a percentage, multiply the decimal by 100 and add a percent sign (%).

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What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100, denoted by the symbol %.

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How do you find the equivalent ratio of 16:10?

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To find the equivalent ratio, divide both numbers by their greatest common divisor (GCD). For 16:10, the GCD is 2, so the equivalent ratio is 8:5.

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CCSS.6.RP.A.3A

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If there are 5 boys and 7 girls, what is the ratio of girls to boys?

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The ratio of girls to boys is 7:5.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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