-24.55% is the change from 664 to 501
Calculation steps:
[( 501 - 664 ) ÷ 664] x 100 = -24.55%
Formula
Percentage change = [(501 - 664) / 664] x 100
Subtract the new number by the original number
501 - 664 = -163
-163 ÷ 664 = -0.24548192771084337
-0.24548192771084337 x 100 = -24.55%