-27.54% is the change from 639 to 463
Calculation steps:
[( 463 - 639 ) ÷ 639] x 100 = -27.54%
Formula
Percentage change = [(463 - 639) / 639] x 100
Subtract the new number by the original number
463 - 639 = -176
-176 ÷ 639 = -0.27543035993740217
-0.27543035993740217 x 100 = -27.54%