Ratios and Rates

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.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor (GCF).

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 dollars per pound.

Front

What is a unit rate?

Back

A unit rate is a rate in which the denominator is 1, indicating how much of one item corresponds to one unit of another.

Front

How do you find the unit rate from a total cost and quantity?

Back

Divide the total cost by the quantity to find the cost per unit.

Front

What is the difference between a ratio and a rate?

Back

A ratio compares two quantities of the same kind, while a rate compares two quantities of different kinds.

Front

If there are 88 students in 4 classes, how many students are in each class?

Back

22 students per class.

Front

Which of the following is NOT a unit rate: 1 yard, 0.3 miles per minute, 1 minute per 3 feet, or 0.75 hour per game?

Back

1 minute per 3 feet.

Front

What does it mean to write a ratio in simplest form?

Back

Writing a ratio in simplest form means reducing it to its lowest terms, where the two numbers have no common factors other than 1.

Front

If you spend $40 on 5 pounds of concrete, what is the unit rate in dollars per pound?

Back

$8 per pound.