2.88% is the change from 521 to 536
Calculation steps:
[( 536 - 521 ) ÷ 521] x 100 = 2.88%
Formula
Percentage change = [(536 - 521) / 521] x 100
Subtract the new number by the original number
536 - 521 = 15
15 ÷ 521 = 0.028790786948176585
0.028790786948176585 x 100 = 2.88%