-30.36% is the change from 988 to 688
Calculation steps:
[( 688 - 988 ) ÷ 988] x 100 = -30.36%
Formula
Percentage change = [(688 - 988) / 988] x 100
Subtract the new number by the original number
688 - 988 = -300
-300 ÷ 988 = -0.30364372469635625
-0.30364372469635625 x 100 = -30.36%