-19.1% is the change from 686 to 555
Calculation steps:
[( 555 - 686 ) ÷ 686] x 100 = -19.1%
Formula
Percentage change = [(555 - 686) / 686] x 100
Subtract the new number by the original number
555 - 686 = -131
-131 ÷ 686 = -0.19096209912536444
-0.19096209912536444 x 100 = -19.1%