-26.24% is the change from 686 to 506
Calculation steps:
[( 506 - 686 ) ÷ 686] x 100 = -26.24%
Formula
Percentage change = [(506 - 686) / 686] x 100
Subtract the new number by the original number
506 - 686 = -180
-180 ÷ 686 = -0.26239067055393583
-0.26239067055393583 x 100 = -26.24%