-32.68% is the change from 664 to 447
Calculation steps:
[( 447 - 664 ) ÷ 664] x 100 = -32.68%
Formula
Percentage change = [(447 - 664) / 664] x 100
Subtract the new number by the original number
447 - 664 = -217
-217 ÷ 664 = -0.32680722891566266
-0.32680722891566266 x 100 = -32.68%