-63.77% is the change from 668 to 242
Calculation steps:
[( 242 - 668 ) ÷ 668] x 100 = -63.77%
Formula
Percentage change = [(242 - 668) / 668] x 100
Subtract the new number by the original number
242 - 668 = -426
-426 ÷ 668 = -0.6377245508982036
-0.6377245508982036 x 100 = -63.77%