54.86% is the change from 638 to 988
Calculation steps:
[( 988 - 638 ) ÷ 638] x 100 = 54.86%
Formula
Percentage change = [(988 - 638) / 638] x 100
Subtract the new number by the original number
988 - 638 = 350
350 ÷ 638 = 0.54858934169279
0.54858934169279 x 100 = 54.86%