10.75% is the change from 521 to 577
Calculation steps:
[( 577 - 521 ) ÷ 521] x 100 = 10.75%
Formula
Percentage change = [(577 - 521) / 521] x 100
Subtract the new number by the original number
577 - 521 = 56
56 ÷ 521 = 0.10748560460652591
0.10748560460652591 x 100 = 10.75%