-85.16% is the change from 869 to 129
Calculation steps:
[( 129 - 869 ) ÷ 869] x 100 = -85.16%
Formula
Percentage change = [(129 - 869) / 869] x 100
Subtract the new number by the original number
129 - 869 = -740
-740 ÷ 869 = -0.8515535097813579
-0.8515535097813579 x 100 = -85.16%