Rates, Ratios, and Proportions

Front

What is a ratio?

Back

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

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or cost per item.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit, such as 60 miles per hour.

Front

How do you find a unit rate?

Back

To find a unit rate, divide the first quantity by the second quantity to get the amount per one unit.

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then divide to find the unknown value.

Front

If 8 oranges cost $1.00, how much do 12 oranges cost?

Back

$1.50

Front

If 92 miles are driven using 4 gallons of gas, what is the unit rate?

Back

23 miles per gallon

Front

Austin mowed 7 lawns in 4 hours. How long will it take him to mow 21 lawns?

Back

12 hours

Front

Solve the proportion: ?/6 = 15/18.

Back

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