55.19% is the change from 520 to 807
Calculation steps:
[( 807 - 520 ) ÷ 520] x 100 = 55.19%
Formula
Percentage change = [(807 - 520) / 520] x 100
Subtract the new number by the original number
807 - 520 = 287
287 ÷ 520 = 0.551923076923077
0.551923076923077 x 100 = 55.19%