-33.89% is the change from 664 to 439
Calculation steps:
[( 439 - 664 ) ÷ 664] x 100 = -33.89%
Formula
Percentage change = [(439 - 664) / 664] x 100
Subtract the new number by the original number
439 - 664 = -225
-225 ÷ 664 = -0.338855421686747
-0.338855421686747 x 100 = -33.89%