-30.03% is the change from 686 to 480
Calculation steps:
[( 480 - 686 ) ÷ 686] x 100 = -30.03%
Formula
Percentage change = [(480 - 686) / 686] x 100
Subtract the new number by the original number
480 - 686 = -206
-206 ÷ 686 = -0.30029154518950435
-0.30029154518950435 x 100 = -30.03%