-19.76% is the change from 850 to 682
Calculation steps:
[( 682 - 850 ) ÷ 850] x 100 = -19.76%
Formula
Percentage change = [(682 - 850) / 850] x 100
Subtract the new number by the original number
682 - 850 = -168
-168 ÷ 850 = -0.1976470588235294
-0.1976470588235294 x 100 = -19.76%