3.88% is the change from 515 to 535
Calculation steps:
[( 535 - 515 ) ÷ 515] x 100 = 3.88%
Formula
Percentage change = [(535 - 515) / 515] x 100
Subtract the new number by the original number
535 - 515 = 20
20 ÷ 515 = 0.038834951456310676
0.038834951456310676 x 100 = 3.88%