-20.94% is the change from 850 to 672
Calculation steps:
[( 672 - 850 ) ÷ 850] x 100 = -20.94%
Formula
Percentage change = [(672 - 850) / 850] x 100
Subtract the new number by the original number
672 - 850 = -178
-178 ÷ 850 = -0.20941176470588235
-0.20941176470588235 x 100 = -20.94%