Ratios, Rates, and Unit Rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b'.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different kinds of quantities, such as speed (miles per hour) or price (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 or $3 per pound.

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 a ratio table?

Back

A ratio table is an organized way to display the relationship between two quantities, showing equivalent ratios.

Front

If there are 3 blue marbles and 2 red marbles, what is the ratio of blue to red?

Back

The ratio of blue to red is 3 to 2.

Front

If a bag contains 5 yellow marbles and 2 red marbles, what is the ratio of red to yellow?

Back

The ratio of red to yellow is 2 to 5.

Front

What is the missing number in the ratio 3:11 if the first number is 3?

Back

The missing number is 11.

Front

If Will spent $3.75 for 3 pounds of granola, what is his unit rate in dollars per pound?

Back

$1.25 per pound.

Front

What is the first step to solve a ratio problem?

Back

Identify the two quantities being compared and write them as a fraction.