-20.51% is the change from 829 to 659
Calculation steps:
[( 659 - 829 ) ÷ 829] x 100 = -20.51%
Formula
Percentage change = [(659 - 829) / 829] x 100
Subtract the new number by the original number
659 - 829 = -170
-170 ÷ 829 = -0.20506634499396864
-0.20506634499396864 x 100 = -20.51%