-20.47% is the change from 850 to 676
Calculation steps:
[( 676 - 850 ) ÷ 850] x 100 = -20.47%
Formula
Percentage change = [(676 - 850) / 850] x 100
Subtract the new number by the original number
676 - 850 = -174
-174 ÷ 850 = -0.20470588235294118
-0.20470588235294118 x 100 = -20.47%