-24.1% is the change from 664 to 504
Calculation steps:
[( 504 - 664 ) ÷ 664] x 100 = -24.1%
Formula
Percentage change = [(504 - 664) / 664] x 100
Subtract the new number by the original number
504 - 664 = -160
-160 ÷ 664 = -0.24096385542168675
-0.24096385542168675 x 100 = -24.1%