-41.17% is the change from 668 to 393
Calculation steps:
[( 393 - 668 ) ÷ 668] x 100 = -41.17%
Formula
Percentage change = [(393 - 668) / 668] x 100
Subtract the new number by the original number
393 - 668 = -275
-275 ÷ 668 = -0.4116766467065868
-0.4116766467065868 x 100 = -41.17%