-31.86% is the change from 998 to 680
Calculation steps:
[( 680 - 998 ) ÷ 998] x 100 = -31.86%
Formula
Percentage change = [(680 - 998) / 998] x 100
Subtract the new number by the original number
680 - 998 = -318
-318 ÷ 998 = -0.3186372745490982
-0.3186372745490982 x 100 = -31.86%