-35.29% is the change from 680 to 440
Calculation steps:
[( 440 - 680 ) ÷ 680] x 100 = -35.29%
Formula
Percentage change = [(440 - 680) / 680] x 100
Subtract the new number by the original number
440 - 680 = -240
-240 ÷ 680 = -0.35294117647058826
-0.35294117647058826 x 100 = -35.29%