-22.71% is the change from 850 to 657
Calculation steps:
[( 657 - 850 ) ÷ 850] x 100 = -22.71%
Formula
Percentage change = [(657 - 850) / 850] x 100
Subtract the new number by the original number
657 - 850 = -193
-193 ÷ 850 = -0.22705882352941176
-0.22705882352941176 x 100 = -22.71%