-80.35% is the change from 850 to 167
Calculation steps:
[( 167 - 850 ) ÷ 850] x 100 = -80.35%
Formula
Percentage change = [(167 - 850) / 850] x 100
Subtract the new number by the original number
167 - 850 = -683
-683 ÷ 850 = -0.8035294117647059
-0.8035294117647059 x 100 = -80.35%