-82.5% is the change from 857 to 150
Calculation steps:
[( 150 - 857 ) ÷ 857] x 100 = -82.5%
Formula
Percentage change = [(150 - 857) / 857] x 100
Subtract the new number by the original number
150 - 857 = -707
-707 ÷ 857 = -0.8249708284714119
-0.8249708284714119 x 100 = -82.5%