50.47% is the change from 638 to 960
Calculation steps:
[( 960 - 638 ) ÷ 638] x 100 = 50.47%
Formula
Percentage change = [(960 - 638) / 638] x 100
Subtract the new number by the original number
960 - 638 = 322
322 ÷ 638 = 0.5047021943573667
0.5047021943573667 x 100 = 50.47%