The grape jelly maker in the previous problem actually uses 3 pounds, 12 ounces of grapes instead of the 4 pounds called for by the recipe. What is the relative error? (There are 16 Ounces in a pound.)
A) 4 ounces
B) -4 ounces
C) 6.25%
D) -6.25%

Question

Quizplus · Accepted Answer

The relative error is calculated by taking the difference between the actual amount used and the amount called for by the recipe, divided by the amount called for by the recipe. The actual amount used is 3 pounds 12 ounces, which is 60 ounces. The recipe calls for 4 pounds, which is 64 ounces. The difference is -4 ounces. The relative error is (-4/64) * 100% = -6.25%.

The Grape Jelly Maker in the Previous Problem Actually Uses