49.06% is the change from 638 to 951
Calculation steps:
[( 951 - 638 ) ÷ 638] x 100 = 49.06%
Formula
Percentage change = [(951 - 638) / 638] x 100
Subtract the new number by the original number
951 - 638 = 313
313 ÷ 638 = 0.49059561128526646
0.49059561128526646 x 100 = 49.06%