60.83% is the change from 503 to 809
Calculation steps:
[( 809 - 503 ) ÷ 503] x 100 = 60.83%
Formula
Percentage change = [(809 - 503) / 503] x 100
Subtract the new number by the original number
809 - 503 = 306
306 ÷ 503 = 0.6083499005964215
0.6083499005964215 x 100 = 60.83%