-53.35% is the change from 686 to 320
Calculation steps:
[( 320 - 686 ) ÷ 686] x 100 = -53.35%
Formula
Percentage change = [(320 - 686) / 686] x 100
Subtract the new number by the original number
320 - 686 = -366
-366 ÷ 686 = -0.5335276967930029
-0.5335276967930029 x 100 = -53.35%