-84.4% is the change from 827 to 129
Calculation steps:
[( 129 - 827 ) ÷ 827] x 100 = -84.4%
Formula
Percentage change = [(129 - 827) / 827] x 100
Subtract the new number by the original number
129 - 827 = -698
-698 ÷ 827 = -0.8440145102781137
-0.8440145102781137 x 100 = -84.4%