-81.79% is the change from 829 to 151
Calculation steps:
[( 151 - 829 ) ÷ 829] x 100 = -81.79%
Formula
Percentage change = [(151 - 829) / 829] x 100
Subtract the new number by the original number
151 - 829 = -678
-678 ÷ 829 = -0.8178528347406514
-0.8178528347406514 x 100 = -81.79%