-41.54% is the change from 857 to 501
Calculation steps:
[( 501 - 857 ) ÷ 857] x 100 = -41.54%
Formula
Percentage change = [(501 - 857) / 857] x 100
Subtract the new number by the original number
501 - 857 = -356
-356 ÷ 857 = -0.41540256709451573
-0.41540256709451573 x 100 = -41.54%