-20.59% is the change from 850 to 675
Calculation steps:
[( 675 - 850 ) ÷ 850] x 100 = -20.59%
Formula
Percentage change = [(675 - 850) / 850] x 100
Subtract the new number by the original number
675 - 850 = -175
-175 ÷ 850 = -0.20588235294117646
-0.20588235294117646 x 100 = -20.59%