-68.76% is the change from 829 to 259
Calculation steps:
[( 259 - 829 ) ÷ 829] x 100 = -68.76%
Formula
Percentage change = [(259 - 829) / 829] x 100
Subtract the new number by the original number
259 - 829 = -570
-570 ÷ 829 = -0.6875753920386007
-0.6875753920386007 x 100 = -68.76%