-18.66% is the change from 686 to 558
Calculation steps:
[( 558 - 686 ) ÷ 686] x 100 = -18.66%
Formula
Percentage change = [(558 - 686) / 686] x 100
Subtract the new number by the original number
558 - 686 = -128
-128 ÷ 686 = -0.18658892128279883
-0.18658892128279883 x 100 = -18.66%