-15.74% is the change from 686 to 578
Calculation steps:
[( 578 - 686 ) ÷ 686] x 100 = -15.74%
Formula
Percentage change = [(578 - 686) / 686] x 100
Subtract the new number by the original number
578 - 686 = -108
-108 ÷ 686 = -0.15743440233236153
-0.15743440233236153 x 100 = -15.74%