-27.23% is the change from 639 to 465
Calculation steps:
[( 465 - 639 ) ÷ 639] x 100 = -27.23%
Formula
Percentage change = [(465 - 639) / 639] x 100
Subtract the new number by the original number
465 - 639 = -174
-174 ÷ 639 = -0.27230046948356806
-0.27230046948356806 x 100 = -27.23%