Ratios & 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' or a:b.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'x per 1 unit'.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the total quantity by the number of units. For example, if you have 40 dollars for 5 pounds, the unit rate is 40 ÷ 5 = 8 dollars per pound.

Front

If 4 pounds of bananas cost $6, what is the cost per pound?

Back

The cost per pound is $6 ÷ 4 = $1.50 per pound.

Front

A cashier rings up 2 customers in 8 minutes. How many customers can he ring up in 32 minutes?

Back

In 32 minutes, he can ring up 8 customers.

Front

Which is the better deal: Oreos for $2.98 for 15 oz or Chips Ahoy for $2.50 for 14 oz?

Back

Chips Ahoy is the better deal.

Front

What is the unit rate of customers served if a store sees 120 customers in 8 hours?

Back

The unit rate is 120 ÷ 8 = 15 customers per hour.

Front

What does it mean if a unit rate is lower?

Back

A lower unit rate indicates a better deal or more value for the same quantity.

Front

How can you compare two unit rates?

Back

To compare two unit rates, calculate each unit rate and see which one is higher or lower.

Front

What is the formula for finding a unit rate?

Back

Unit Rate = Total Quantity ÷ Number of Units.