-51.05% is the change from 668 to 327
Calculation steps:
[( 327 - 668 ) ÷ 668] x 100 = -51.05%
Formula
Percentage change = [(327 - 668) / 668] x 100
Subtract the new number by the original number
327 - 668 = -341
-341 ÷ 668 = -0.5104790419161677
-0.5104790419161677 x 100 = -51.05%
Example