-81.47% is the change from 680 to 126
Calculation steps:
[( 126 - 680 ) ÷ 680] x 100 = -81.47%
Formula
Percentage change = [(126 - 680) / 680] x 100
Subtract the new number by the original number
126 - 680 = -554
-554 ÷ 680 = -0.8147058823529412
-0.8147058823529412 x 100 = -81.47%