-81.76% is the change from 828 to 151
Calculation steps:
[( 151 - 828 ) ÷ 828] x 100 = -81.76%
Formula
Percentage change = [(151 - 828) / 828] x 100
Subtract the new number by the original number
151 - 828 = -677
-677 ÷ 828 = -0.8176328502415459
-0.8176328502415459 x 100 = -81.76%