-79.47% is the change from 828 to 170
Calculation steps:
[( 170 - 828 ) ÷ 828] x 100 = -79.47%
Formula
Percentage change = [(170 - 828) / 828] x 100
Subtract the new number by the original number
170 - 828 = -658
-658 ÷ 828 = -0.7946859903381642
-0.7946859903381642 x 100 = -79.47%