0.39% is the change from 519 to 521
Calculation steps:
[( 521 - 519 ) ÷ 519] x 100 = 0.39%
Formula
Percentage change = [(521 - 519) / 519] x 100
Subtract the new number by the original number
521 - 519 = 2
2 ÷ 519 = 0.0038535645472061657
0.0038535645472061657 x 100 = 0.39%