-31.17% is the change from 988 to 680
Calculation steps:
[( 680 - 988 ) ÷ 988] x 100 = -31.17%
Formula
Percentage change = [(680 - 988) / 988] x 100
Subtract the new number by the original number
680 - 988 = -308
-308 ÷ 988 = -0.3117408906882591
-0.3117408906882591 x 100 = -31.17%