-61.76% is the change from 680 to 260
Calculation steps:
[( 260 - 680 ) ÷ 680] x 100 = -61.76%
Formula
Percentage change = [(260 - 680) / 680] x 100
Subtract the new number by the original number
260 - 680 = -420
-420 ÷ 680 = -0.6176470588235294
-0.6176470588235294 x 100 = -61.76%