Question

What is the percent increase or decrease from 48 to 21?

(Round to the nearest whole)
A. 56% decrease
B. 129% decrease
C. 2295 decrease
D. 27 decrease

Answer 1

A because 21 is about 50% of 48 and the other answers are unreasonable

Answer 2

A.

Because 48 to 21 is a decrease, so to answer the percent decrease you do
48-21/48
Which means
original price-new price/original price.
And all these equals 0.5625, so therefore 56% decrease.