-30.92% is the change from 993 to 686
Calculation steps:
[( 686 - 993 ) ÷ 993] x 100 = -30.92%
Formula
Percentage change = [(686 - 993) / 993] x 100
Subtract the new number by the original number
686 - 993 = -307
-307 ÷ 993 = -0.30916414904330314
-0.30916414904330314 x 100 = -30.92%