53.74% is the change from 521 to 801
Calculation steps:
[( 801 - 521 ) ÷ 521] x 100 = 53.74%
Formula
Percentage change = [(801 - 521) / 521] x 100
Subtract the new number by the original number
801 - 521 = 280
280 ÷ 521 = 0.5374280230326296
0.5374280230326296 x 100 = 53.74%