-8.78% is the change from 501 to 457
Calculation steps:
[( 457 - 501 ) ÷ 501] x 100 = -8.78%
Formula
Percentage change = [(457 - 501) / 501] x 100
Subtract the new number by the original number
457 - 501 = -44
-44 ÷ 501 = -0.08782435129740519
-0.08782435129740519 x 100 = -8.78%