-28.17% is the change from 639 to 459
Calculation steps:
[( 459 - 639 ) ÷ 639] x 100 = -28.17%
Formula
Percentage change = [(459 - 639) / 639] x 100
Subtract the new number by the original number
459 - 639 = -180
-180 ÷ 639 = -0.28169014084507044
-0.28169014084507044 x 100 = -28.17%