-1.96% is the change from 867 to 850
Calculation steps:
[( 850 - 867 ) ÷ 867] x 100 = -1.96%
Formula
Percentage change = [(850 - 867) / 867] x 100
Subtract the new number by the original number
850 - 867 = -17
-17 ÷ 867 = -0.0196078431372549
-0.0196078431372549 x 100 = -1.96%