Review :: Ratios, Rates, Unit Rates

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 write a ratio?

Back

Ratios can be written in three ways: as a fraction (e.g., 2/3), with a colon (e.g., 2:3), or with the word 'to' (e.g., 2 to 3).

Front

What is the ratio of red to yellow marbles if there are 2 red and 5 yellow?

Back

The ratio of red to yellow marbles is 2 to 5.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

Front

If a store sees 120 customers in 8 hours, what is the unit rate in customers per hour?

Back

The unit rate is 15 customers per hour.

Front

What is an equivalent ratio?

Back

An equivalent ratio is when two or more ratios express the same relationship between quantities.

Front

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

Back

The unit rate is $8 per pound.

Front

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

Back

Front

What is the formula to calculate a unit rate?

Back

The formula to calculate a unit rate is: Unit Rate = Total Quantity / Total Cost.

Front

If you have a ratio of 3 to 4, what is the equivalent ratio?

Back

An equivalent ratio could be 6 to 8, as both ratios simplify to the same fraction.