-80.07% is the change from 828 to 165
Calculation steps:
[( 165 - 828 ) ÷ 828] x 100 = -80.07%
Formula
Percentage change = [(165 - 828) / 828] x 100
Subtract the new number by the original number
165 - 828 = -663
-663 ÷ 828 = -0.8007246376811594
-0.8007246376811594 x 100 = -80.07%