-80.31% is the change from 828 to 163
Calculation steps:
[( 163 - 828 ) ÷ 828] x 100 = -80.31%
Formula
Percentage change = [(163 - 828) / 828] x 100
Subtract the new number by the original number
163 - 828 = -665
-665 ÷ 828 = -0.8031400966183575
-0.8031400966183575 x 100 = -80.31%