-54.04% is the change from 668 to 307
Calculation steps:
[( 307 - 668 ) ÷ 668] x 100 = -54.04%
Formula
Percentage change = [(307 - 668) / 668] x 100
Subtract the new number by the original number
307 - 668 = -361
-361 ÷ 668 = -0.5404191616766467
-0.5404191616766467 x 100 = -54.04%