Ratios and Proportions Review

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

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the quantity by the number of units. For example, if you earn $30 for 5 hours of work, the unit rate is $30 ÷ 5 = $6 per hour.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and set the products equal to each other. For example, if a/b = c/d, then ad = bc.

Front

What is the formula to find the total earnings based on hourly wage?

Back

Total Earnings = Hourly Wage × Hours Worked.

Front

If Stacy worked 6 hours each day for 6 days and earned $234, how much did she earn per hour?

Back

$6.50.

Front

What is the relationship between distance, speed, and time?

Back

The relationship is defined by the formula: Distance = Speed × Time.

Front

If Demetrius drives for 2 hours at 55 miles per hour, how far does he travel?

Back

Distance = Speed × Time = 55 miles/hour × 2 hours = 110 miles.

Front

If a table shows calories burned per mile, how do you find total calories burned?

Back

Total Calories Burned = Calories per Mile × Number of Miles.

Front

What is the ratio of brownies sold to the total number of cupcakes and cookies sold if 32 brownies, 43 cupcakes, and 25 cookies were sold?

Back

The ratio is 32:75.