-97.95% is the change from 828 to 17
Calculation steps:
[( 17 - 828 ) ÷ 828] x 100 = -97.95%
Formula
Percentage change = [(17 - 828) / 828] x 100
Subtract the new number by the original number
17 - 828 = -811
-811 ÷ 828 = -0.9794685990338164
-0.9794685990338164 x 100 = -97.95%