-61.96% is the change from 828 to 315
Calculation steps:
[( 315 - 828 ) ÷ 828] x 100 = -61.96%
Formula
Percentage change = [(315 - 828) / 828] x 100
Subtract the new number by the original number
315 - 828 = -513
-513 ÷ 828 = -0.6195652173913043
-0.6195652173913043 x 100 = -61.96%