-63.62% is the change from 668 to 243
Calculation steps:
[( 243 - 668 ) ÷ 668] x 100 = -63.62%
Formula
Percentage change = [(243 - 668) / 668] x 100
Subtract the new number by the original number
243 - 668 = -425
-425 ÷ 668 = -0.6362275449101796
-0.6362275449101796 x 100 = -63.62%