-27.19% is the change from 857 to 624
Calculation steps:
[( 624 - 857 ) ÷ 857] x 100 = -27.19%
Formula
Percentage change = [(624 - 857) / 857] x 100
Subtract the new number by the original number
624 - 857 = -233
-233 ÷ 857 = -0.2718786464410735
-0.2718786464410735 x 100 = -27.19%