What was the percent change in unit price when a box of tissues dropped from 400 to 350 tissues per box? (with no change in the price per box)?
A) 12.5%
B) 15%
C) 17.5%
D) 11.7%
E) 14.3%

Question

Quizplus · Accepted Answer

The unit price change is calculated by the formula: ((Old Quantity - New Quantity) / Old Quantity) * 100. Here, ((400 - 350) / 400) * 100 = 12.5%. However, the question asks for the change in unit price, which is inversely proportional to the quantity change. So, the correct calculation is ((400/350) - 1) * 100 = 14.3%.

What Was the Percent Change in Unit Price When a Box