-13.1% is the change from 664 to 577
Calculation steps:
[( 577 - 664 ) ÷ 664] x 100 = -13.1%
Formula
Percentage change = [(577 - 664) / 664] x 100
Subtract the new number by the original number
577 - 664 = -87
-87 ÷ 664 = -0.13102409638554216
-0.13102409638554216 x 100 = -13.1%