Question

Size (oz) Price ($) 16 3.36 Regular Family Size 40 7.60 a.) What is the unit rate for each size of peanut butter? Regular: $ per ounce Family size: $ per ounce b.) Which size is a better buy?

Answer 1

ANSWERS

a) Regular $ 0.21 per ounce

Family size $ 0.19 per ounce

b) Family size

EXPLANATION

To find the unit rates we have to divide the price by the amount of ounces:

For regular peanut butter:

$\frac{3.36}{16}=0.21$

For family size:

$\frac{7.60}{40}=0.19$

The one that has a smaller unit rate is a better buy. In this case, the family size is a better buy.