3.94% is the change from 508 to 528
Calculation steps:
[( 528 - 508 ) ÷ 508] x 100 = 3.94%
Formula
Percentage change = [(528 - 508) / 508] x 100
Subtract the new number by the original number
528 - 508 = 20
20 ÷ 508 = 0.03937007874015748
0.03937007874015748 x 100 = 3.94%