-34.14% is the change from 665 to 438
Calculation steps:
[( 438 - 665 ) ÷ 665] x 100 = -34.14%
Formula
Percentage change = [(438 - 665) / 665] x 100
Subtract the new number by the original number
438 - 665 = -227
-227 ÷ 665 = -0.34135338345864663
-0.34135338345864663 x 100 = -34.14%