Rates & Unit Rates

When are unit rates useful? Choose the best answer.

• When you want to subtract a number by another.

• When you want to multiply one number by another.

• When you want to compare prices.

• When you want to figure out the probability of a number.

You travel 150 miles on 5 gallons. How far did you travel per gallon?

• 15 miles

• 30 miles

• 3 miles

• 25 miles

Solve the proportion below:

• 3

• 24

• 21

• 12

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $35 per pound

• $5 per pound

• $0.125 per pound

A store has 120 customers in 6 hours. What is the unit rate in customers per hour?

• 16 customers per hour

• 12 customers per hour

• 20 customers per hour

• 15 customers per hour

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?

• $.50 per pound

• $1.25 per pound

• $3 per pound

• $2.50 per pound

A car travels 160 miles in 4 hours.  At this rate, how far will the car travel in 7 hours?

• 280 miles

• 40 miles

• 280 miles per hour

• 240 miles

You go to the grocery store to buy dog food. The store has three sizes available:

A 20-lb bag for $23.44

An 8-lb bag for $9.88

A 40-lb bag for $49.00

Which size bag has the lowest cost per pound rounded to the nearest cent?

• The 8-lb bag

• The 20-lb bag

• The 40-lb bag

• I have a cat

Harry mowed eight lawns and earned $96. How much did he earn for each lawn?

• $96

• $12

• $768

• $8