-8.58% is the change from 664 to 607
Calculation steps:
[( 607 - 664 ) ÷ 664] x 100 = -8.58%
Formula
Percentage change = [(607 - 664) / 664] x 100
Subtract the new number by the original number
607 - 664 = -57
-57 ÷ 664 = -0.0858433734939759
-0.0858433734939759 x 100 = -8.58%