-37.5% is the change from 448 to 280
Calculation steps:
[( 280 - 448 ) ÷ 448] x 100 = -37.5%
Formula
Percentage change = [(280 - 448) / 448] x 100
Subtract the new number by the original number
280 - 448 = -168
-168 ÷ 448 = -0.375
-0.375 x 100 = -37.5%