A 6-inch-by-10-inch rectangle is cut down to a 5-inch-by-8-inch rectangle. What is the percent of decrease in the area? Express your answer as a mixed number percent.

33 1/3% decrease

Step-by-step explanation:

The original area is (6in) (10in) = 60 in². The reduced area is (5in) (8in) = 40 in². Then the change in area is ...

((new value) / (old value) - 1) * 100%

(40/60 - 1) * 100% = - 1/3*100% = - 33 1/3%

The area decreased by 33 1/3%.