-79.49% is the change from 829 to 170
Calculation steps:
[( 170 - 829 ) ÷ 829] x 100 = -79.49%
Formula
Percentage change = [(170 - 829) / 829] x 100
Subtract the new number by the original number
170 - 829 = -659
-659 ÷ 829 = -0.7949336550060314
-0.7949336550060314 x 100 = -79.49%