-16.57% is the change from 857 to 715
Calculation steps:
[( 715 - 857 ) ÷ 857] x 100 = -16.57%
Formula
Percentage change = [(715 - 857) / 857] x 100
Subtract the new number by the original number
715 - 857 = -142
-142 ÷ 857 = -0.16569428238039674
-0.16569428238039674 x 100 = -16.57%