61.61% is the change from 521 to 842
Calculation steps:
[( 842 - 521 ) ÷ 521] x 100 = 61.61%
Formula
Percentage change = [(842 - 521) / 521] x 100
Subtract the new number by the original number
842 - 521 = 321
321 ÷ 521 = 0.6161228406909789
0.6161228406909789 x 100 = 61.61%