-57.35% is the change from 680 to 290
Calculation steps:
[( 290 - 680 ) ÷ 680] x 100 = -57.35%
Formula
Percentage change = [(290 - 680) / 680] x 100
Subtract the new number by the original number
290 - 680 = -390
-390 ÷ 680 = -0.5735294117647058
-0.5735294117647058 x 100 = -57.35%