-6.17% is the change from 664 to 623
Calculation steps:
[( 623 - 664 ) ÷ 664] x 100 = -6.17%
Formula
Percentage change = [(623 - 664) / 664] x 100
Subtract the new number by the original number
623 - 664 = -41
-41 ÷ 664 = -0.061746987951807226
-0.061746987951807226 x 100 = -6.17%