57.31% is the change from 520 to 818
Calculation steps:
[( 818 - 520 ) ÷ 520] x 100 = 57.31%
Formula
Percentage change = [(818 - 520) / 520] x 100
Subtract the new number by the original number
818 - 520 = 298
298 ÷ 520 = 0.573076923076923
0.573076923076923 x 100 = 57.31%