-81.88% is the change from 850 to 154
Calculation steps:
[( 154 - 850 ) ÷ 850] x 100 = -81.88%
Formula
Percentage change = [(154 - 850) / 850] x 100
Subtract the new number by the original number
154 - 850 = -696
-696 ÷ 850 = -0.8188235294117647
-0.8188235294117647 x 100 = -81.88%