Solving Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the two ratios and set the products equal to each other.

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CCSS.7.RP.A.3

Front

What is the formula for finding a unit rate?

Back

The unit rate is found by dividing the numerator by the denominator.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a car travels 120 miles in 3 hours, what is its speed in miles per hour?

Back

Speed = Distance/Time = 120 miles / 3 hours = 40 miles per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they can be expressed as equivalent fractions.

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CCSS.7.RP.A.2D

Front

In a ratio of 3:5, if there are 25 dogs, how many cats are there?

Back

15 cats.

Front

What is the simplest form of the ratio 10:15?

Back

The simplest form is 2:3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you convert a ratio to a fraction?

Back

To convert a ratio to a fraction, write the first number as the numerator and the second number as the denominator.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the ratio of bones to frisbees if there are 10 frisbees and 8 bones?

Back

The ratio is 8:10, which simplifies to 4:5.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If there are 5 ice cream cones for every 3 brownies, how many cones are sold if 24 brownies are sold?

Back

40 ice cream cones.

Tags

CCSS.6.RP.A.3B