-42.12% is the change from 857 to 496
Calculation steps:
[( 496 - 857 ) ÷ 857] x 100 = -42.12%
Formula
Percentage change = [(496 - 857) / 857] x 100
Subtract the new number by the original number
496 - 857 = -361
-361 ÷ 857 = -0.42123687281213534
-0.42123687281213534 x 100 = -42.12%