Unit Rate Math Example 4

Follow the full solution, then compare it with the other examples linked below.

Example 4

medium
Brand A sells 12 oz of cereal for \3.60. Brand B sells 18 oz for \4.50. Which is the better deal?

Solution

  1. 1
    Brand A unit price: \frac{\3.60}{12 \text{ oz}} = \0.300.30 per oz.
  2. 2
    Brand B unit price: \frac{\4.50}{18 \text{ oz}} = \0.250.25 per oz.
  3. 3
    Compare: \0.25 < \0.300.30, so Brand B is cheaper per ounce.

Answer

Brand B at \$0.25 per oz
To compare products sold in different sizes, convert each to a unit rate (price per single ounce) and pick the lower one.

About Unit Rate

A rate expressed as a quantity per single unit of another quantity, such as miles per hour or cost per item.

Learn more about Unit Rate โ†’

More Unit Rate Examples

Example 1 easy

A car travels 240 miles using 8 gallons of gas. What is the unit rate in miles per gallon?

Example 2 medium

A 12-pack of juice costs [formula]8.00. Which is the better deal?

Example 3 easy

A runner completes 15 laps in 45 minutes. What is the unit rate in minutes per lap?

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