39.28% is the change from 639 to 890
Calculation steps:
[( 890 - 639 ) ÷ 639] x 100 = 39.28%
Formula
Percentage change = [(890 - 639) / 639] x 100
Subtract the new number by the original number
890 - 639 = 251
251 ÷ 639 = 0.39280125195618154
0.39280125195618154 x 100 = 39.28%