77.5% is the change from 520 to 923
Calculation steps:
[( 923 - 520 ) ÷ 520] x 100 = 77.5%
Formula
Percentage change = [(923 - 520) / 520] x 100
Subtract the new number by the original number
923 - 520 = 403
403 ÷ 520 = 0.775
0.775 x 100 = 77.5%
Example