Question

A 3-pound package of ground beef is $7.80. A 1/2-pound package is $1.28. What is the difference in the cost per pound between the larger and smaller packages of beef?

Please have an explanation.

Answer 1

$0.04/lb

Explanation:

Cost per lb for the 3 lb package is $7.80/(3 lb), or $2.60/lb)

Cost per lb for the 1/2-lb package is $1.28 / [(1/2) lb], or $2.56.

The difference in cost per pound is $2.60 - $2.56, or $0.04/lb