4.21% is the change from 499 to 520
Calculation steps:
[( 520 - 499 ) ÷ 499] x 100 = 4.21%
Formula
Percentage change = [(520 - 499) / 499] x 100
Subtract the new number by the original number
520 - 499 = 21
21 ÷ 499 = 0.04208416833667335
0.04208416833667335 x 100 = 4.21%