-91.94% is the change from 509 to 41
Calculation steps:
[( 41 - 509 ) ÷ 509] x 100 = -91.94%
Formula
Percentage change = [(41 - 509) / 509] x 100
Subtract the new number by the original number
41 - 509 = -468
-468 ÷ 509 = -0.9194499017681729
-0.9194499017681729 x 100 = -91.94%