-32.63% is the change from 668 to 450
Calculation steps:
[( 450 - 668 ) ÷ 668] x 100 = -32.63%
Formula
Percentage change = [(450 - 668) / 668] x 100
Subtract the new number by the original number
450 - 668 = -218
-218 ÷ 668 = -0.3263473053892216
-0.3263473053892216 x 100 = -32.63%