-38.75% is the change from 818 to 501
Calculation steps:
[( 501 - 818 ) ÷ 818] x 100 = -38.75%
Formula
Percentage change = [(501 - 818) / 818] x 100
Subtract the new number by the original number
501 - 818 = -317
-317 ÷ 818 = -0.38753056234718825
-0.38753056234718825 x 100 = -38.75%