-15.99% is the change from 857 to 720
Calculation steps:
[( 720 - 857 ) ÷ 857] x 100 = -15.99%
Formula
Percentage change = [(720 - 857) / 857] x 100
Subtract the new number by the original number
720 - 857 = -137
-137 ÷ 857 = -0.15985997666277713
-0.15985997666277713 x 100 = -15.99%