6.12% is the change from 490 to 520
Calculation steps:
[( 520 - 490 ) ÷ 490] x 100 = 6.12%
Formula
Percentage change = [(520 - 490) / 490] x 100
Subtract the new number by the original number
520 - 490 = 30
30 ÷ 490 = 0.061224489795918366
0.061224489795918366 x 100 = 6.12%