4.47% is the change from 515 to 538
Calculation steps:
[( 538 - 515 ) ÷ 515] x 100 = 4.47%
Formula
Percentage change = [(538 - 515) / 515] x 100
Subtract the new number by the original number
538 - 515 = 23
23 ÷ 515 = 0.04466019417475728
0.04466019417475728 x 100 = 4.47%