-63.01% is the change from 857 to 317
Calculation steps:
[( 317 - 857 ) ÷ 857] x 100 = -63.01%
Formula
Percentage change = [(317 - 857) / 857] x 100
Subtract the new number by the original number
317 - 857 = -540
-540 ÷ 857 = -0.6301050175029171
-0.6301050175029171 x 100 = -63.01%