-30.32% is the change from 686 to 478
Calculation steps:
[( 478 - 686 ) ÷ 686] x 100 = -30.32%
Formula
Percentage change = [(478 - 686) / 686] x 100
Subtract the new number by the original number
478 - 686 = -208
-208 ÷ 686 = -0.3032069970845481
-0.3032069970845481 x 100 = -30.32%