3.69% is the change from 515 to 534
Calculation steps:
[( 534 - 515 ) ÷ 515] x 100 = 3.69%
Formula
Percentage change = [(534 - 515) / 515] x 100
Subtract the new number by the original number
534 - 515 = 19
19 ÷ 515 = 0.036893203883495145
0.036893203883495145 x 100 = 3.69%