-27.07% is the change from 639 to 466
Calculation steps:
[( 466 - 639 ) ÷ 639] x 100 = -27.07%
Formula
Percentage change = [(466 - 639) / 639] x 100
Subtract the new number by the original number
466 - 639 = -173
-173 ÷ 639 = -0.27073552425665104
-0.27073552425665104 x 100 = -27.07%