-30.47% is the change from 686 to 477
Calculation steps:
[( 477 - 686 ) ÷ 686] x 100 = -30.47%
Formula
Percentage change = [(477 - 686) / 686] x 100
Subtract the new number by the original number
477 - 686 = -209
-209 ÷ 686 = -0.30466472303207
-0.30466472303207 x 100 = -30.47%