-36.56% is the change from 867 to 550
Calculation steps:
[( 550 - 867 ) ÷ 867] x 100 = -36.56%
Formula
Percentage change = [(550 - 867) / 867] x 100
Subtract the new number by the original number
550 - 867 = -317
-317 ÷ 867 = -0.36562860438292966
-0.36562860438292966 x 100 = -36.56%