-27.71% is the change from 664 to 480
Calculation steps:
[( 480 - 664 ) ÷ 664] x 100 = -27.71%
Formula
Percentage change = [(480 - 664) / 664] x 100
Subtract the new number by the original number
480 - 664 = -184
-184 ÷ 664 = -0.27710843373493976
-0.27710843373493976 x 100 = -27.71%