Rates Math Example 4

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

Example 4

hard
Juice costs \3.84for for 16flozor fl oz or \5.105.10 for 3030 fl oz. Which is the better deal per fluid ounce?

Solution

  1. 1
    Unit price of the small bottle: \3.84 \div 16 = \0.240.24 per fl oz.
  2. 2
    Unit price of the large bottle: \5.10 \div 30 = \0.170.17 per fl oz.
  3. 3
    Compare: \0.17 < \0.240.24, so the 3030 fl oz bottle is the better deal.

Answer

TheĀ 30Ā flĀ ozĀ bottleĀ atĀ $0.17Ā perĀ flĀ ozĀ isĀ theĀ betterĀ deal\text{The 30 fl oz bottle at } \$0.17 \text{ per fl oz is the better deal}
Computing the unit price (cost per one unit) of each option allows a fair comparison regardless of package size. The option with the lower unit price gives more value for money.

About Rates

A rate is a ratio that compares two quantities measured in different units, expressing how much of one quantity corresponds to a given amount of another. It is often written as 'per' one unit of the second quantity, such as miles per hour or dollars per pound.

Learn more about Rates ā†’

More Rates Examples

Example 1 easy

A car travels [formula] miles in [formula] hours. What is its speed as a unit rate in miles per hour

Example 2 medium

Printer A prints [formula] pages in [formula] minutes and Printer B prints [formula] pages in [formu

Example 3 easy

A typist types [formula] words in [formula] minutes. What is the unit rate in words per minute?

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