-52.19% is the change from 686 to 328
Calculation steps:
[( 328 - 686 ) ÷ 686] x 100 = -52.19%
Formula
Percentage change = [(328 - 686) / 686] x 100
Subtract the new number by the original number
328 - 686 = -358
-358 ÷ 686 = -0.521865889212828
-0.521865889212828 x 100 = -52.19%