2.69% is the change from 521 to 535
Calculation steps:
[( 535 - 521 ) ÷ 521] x 100 = 2.69%
Formula
Percentage change = [(535 - 521) / 521] x 100
Subtract the new number by the original number
535 - 521 = 14
14 ÷ 521 = 0.026871401151631478
0.026871401151631478 x 100 = 2.69%