-24.73% is the change from 639 to 481
Calculation steps:
[( 481 - 639 ) ÷ 639] x 100 = -24.73%
Formula
Percentage change = [(481 - 639) / 639] x 100
Subtract the new number by the original number
481 - 639 = -158
-158 ÷ 639 = -0.24726134585289514
-0.24726134585289514 x 100 = -24.73%