-68.83% is the change from 831 to 259
Calculation steps:
[( 259 - 831 ) ÷ 831] x 100 = -68.83%
Formula
Percentage change = [(259 - 831) / 831] x 100
Subtract the new number by the original number
259 - 831 = -572
-572 ÷ 831 = -0.6883273164861613
-0.6883273164861613 x 100 = -68.83%