-46.86% is the change from 668 to 355
Calculation steps:
[( 355 - 668 ) ÷ 668] x 100 = -46.86%
Formula
Percentage change = [(355 - 668) / 668] x 100
Subtract the new number by the original number
355 - 668 = -313
-313 ÷ 668 = -0.468562874251497
-0.468562874251497 x 100 = -46.86%