49.4% is the change from 668 to 998
Calculation steps:
[( 998 - 668 ) ÷ 668] x 100 = 49.4%
Formula
Percentage change = [(998 - 668) / 668] x 100
Subtract the new number by the original number
998 - 668 = 330
330 ÷ 668 = 0.4940119760479042
0.4940119760479042 x 100 = 49.4%