3.79% is the change from 501 to 520
Calculation steps:
[( 520 - 501 ) ÷ 501] x 100 = 3.79%
Formula
Percentage change = [(520 - 501) / 501] x 100
Subtract the new number by the original number
520 - 501 = 19
19 ÷ 501 = 0.03792415169660679
0.03792415169660679 x 100 = 3.79%