-16.35% is the change from 850 to 711
Calculation steps:
[( 711 - 850 ) ÷ 850] x 100 = -16.35%
Formula
Percentage change = [(711 - 850) / 850] x 100
Subtract the new number by the original number
711 - 850 = -139
-139 ÷ 850 = -0.1635294117647059
-0.1635294117647059 x 100 = -16.35%