-81.63% is the change from 686 to 126
Calculation steps:
[( 126 - 686 ) ÷ 686] x 100 = -81.63%
Formula
Percentage change = [(126 - 686) / 686] x 100
Subtract the new number by the original number
126 - 686 = -560
-560 ÷ 686 = -0.8163265306122449
-0.8163265306122449 x 100 = -81.63%