Determine Unit Rates with Ratios of Fractions

How do you solve complex fractions?

• Multiply by the reciprocal.

• Divide the fractions.

What is a complex fraction?

• Complex fractions are fractions with one hundred as a denominator.

• Complex fractions are fractions with numerator, denominator, or both that are also fractions.

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

• $8 per pound
• $5 per pound
• $35 per pound
• $18.00 per pounds

A store sees 120 customers in 8 hours. What is the unit rate (in customers per hour)?

• 16 customers per hour
• 15 customers per hour
• 12 customers per hour
• 20 customers per hour

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

• $1.25 per pound
• $1 per pound
• $2 per pound
• $1.50 per pound

8.  Find the unit rate of $97.50 for 15 pizzas.

• $6 per pizza
• $82.50 per pizza
• $5.50 per pizza
• $6.50 per pizza

Eden bikes 4/3 miles in 1/10 hour. How long does it take her to bike one mile?

• 15/2 hours

• 2/15 hours

• 40/3 hours

• 3/40 hours

A recipe calls for 2/3 cup white sugar for every ¾ cup brown sugar. If I want to use 1 cup of white sugar, how much brown sugar should I use?

• 9/8 cups

• 1/2 cups

• 8/9 cups

• 2 cups

Jahzaia A. mows 1/6 of an acre in 1/4 hour. How many acres does Jahzaia A. mow per hour? 

• 6/4
• 2/3
• 2
• 3