55.09% is the change from 521 to 808
Calculation steps:
[( 808 - 521 ) ÷ 521] x 100 = 55.09%
Formula
Percentage change = [(808 - 521) / 521] x 100
Subtract the new number by the original number
808 - 521 = 287
287 ÷ 521 = 0.5508637236084453
0.5508637236084453 x 100 = 55.09%