56.92% is the change from 520 to 816
Calculation steps:
[( 816 - 520 ) ÷ 520] x 100 = 56.92%
Formula
Percentage change = [(816 - 520) / 520] x 100
Subtract the new number by the original number
816 - 520 = 296
296 ÷ 520 = 0.5692307692307692
0.5692307692307692 x 100 = 56.92%