-30.57% is the change from 988 to 686
Calculation steps:
[( 686 - 988 ) ÷ 988] x 100 = -30.57%
Formula
Percentage change = [(686 - 988) / 988] x 100
Subtract the new number by the original number
686 - 988 = -302
-302 ÷ 988 = -0.305668016194332
-0.305668016194332 x 100 = -30.57%