-4.97% is the change from 664 to 631
Calculation steps:
[( 631 - 664 ) ÷ 664] x 100 = -4.97%
Formula
Percentage change = [(631 - 664) / 664] x 100
Subtract the new number by the original number
631 - 664 = -33
-33 ÷ 664 = -0.04969879518072289
-0.04969879518072289 x 100 = -4.97%