55.64% is the change from 638 to 993
Calculation steps:
[( 993 - 638 ) ÷ 638] x 100 = 55.64%
Formula
Percentage change = [(993 - 638) / 638] x 100
Subtract the new number by the original number
993 - 638 = 355
355 ÷ 638 = 0.5564263322884012
0.5564263322884012 x 100 = 55.64%