20.38% is the change from 530 to 638
Calculation steps:
[( 638 - 530 ) ÷ 530] x 100 = 20.38%
Formula
Percentage change = [(638 - 530) / 530] x 100
Subtract the new number by the original number
638 - 530 = 108
108 ÷ 530 = 0.2037735849056604
0.2037735849056604 x 100 = 20.38%