-32.78% is the change from 668 to 449
Calculation steps:
[( 449 - 668 ) ÷ 668] x 100 = -32.78%
Formula
Percentage change = [(449 - 668) / 668] x 100
Subtract the new number by the original number
449 - 668 = -219
-219 ÷ 668 = -0.3278443113772455
-0.3278443113772455 x 100 = -32.78%