-33.07% is the change from 998 to 668
Calculation steps:
[( 668 - 998 ) ÷ 998] x 100 = -33.07%
Formula
Percentage change = [(668 - 998) / 998] x 100
Subtract the new number by the original number
668 - 998 = -330
-330 ÷ 998 = -0.3306613226452906
-0.3306613226452906 x 100 = -33.07%