-26.76% is the change from 639 to 468
Calculation steps:
[( 468 - 639 ) ÷ 639] x 100 = -26.76%
Formula
Percentage change = [(468 - 639) / 639] x 100
Subtract the new number by the original number
468 - 639 = -171
-171 ÷ 639 = -0.2676056338028169
-0.2676056338028169 x 100 = -26.76%