-64.71% is the change from 680 to 240
Calculation steps:
[( 240 - 680 ) ÷ 680] x 100 = -64.71%
Formula
Percentage change = [(240 - 680) / 680] x 100
Subtract the new number by the original number
240 - 680 = -440
-440 ÷ 680 = -0.6470588235294118
-0.6470588235294118 x 100 = -64.71%