27.5% is the change from 520 to 663
Calculation steps:
[( 663 - 520 ) ÷ 520] x 100 = 27.5%
Formula
Percentage change = [(663 - 520) / 520] x 100
Subtract the new number by the original number
663 - 520 = 143
143 ÷ 520 = 0.275
0.275 x 100 = 27.5%
Example