56.27% is the change from 638 to 997
Calculation steps:
[( 997 - 638 ) ÷ 638] x 100 = 56.27%
Formula
Percentage change = [(997 - 638) / 638] x 100
Subtract the new number by the original number
997 - 638 = 359
359 ÷ 638 = 0.5626959247648903
0.5626959247648903 x 100 = 56.27%