-79.25% is the change from 829 to 172
Calculation steps:
[( 172 - 829 ) ÷ 829] x 100 = -79.25%
Formula
Percentage change = [(172 - 829) / 829] x 100
Subtract the new number by the original number
172 - 829 = -657
-657 ÷ 829 = -0.7925211097708083
-0.7925211097708083 x 100 = -79.25%