-84.56% is the change from 829 to 128
Calculation steps:
[( 128 - 829 ) ÷ 829] x 100 = -84.56%
Formula
Percentage change = [(128 - 829) / 829] x 100
Subtract the new number by the original number
128 - 829 = -701
-701 ÷ 829 = -0.8455971049457177
-0.8455971049457177 x 100 = -84.56%