20.83% is the change from 528 to 638
Calculation steps:
[( 638 - 528 ) ÷ 528] x 100 = 20.83%
Formula
Percentage change = [(638 - 528) / 528] x 100
Subtract the new number by the original number
638 - 528 = 110
110 ÷ 528 = 0.20833333333333334
0.20833333333333334 x 100 = 20.83%