-18.83% is the change from 664 to 539
Calculation steps:
[( 539 - 664 ) ÷ 664] x 100 = -18.83%
Formula
Percentage change = [(539 - 664) / 664] x 100
Subtract the new number by the original number
539 - 664 = -125
-125 ÷ 664 = -0.18825301204819278
-0.18825301204819278 x 100 = -18.83%