48.51% is the change from 639 to 949
Calculation steps:
[( 949 - 639 ) ÷ 639] x 100 = 48.51%
Formula
Percentage change = [(949 - 639) / 639] x 100
Subtract the new number by the original number
949 - 639 = 310
310 ÷ 639 = 0.48513302034428796
0.48513302034428796 x 100 = 48.51%