57.76% is the change from 509 to 803
Calculation steps:
[( 803 - 509 ) ÷ 509] x 100 = 57.76%
Formula
Percentage change = [(803 - 509) / 509] x 100
Subtract the new number by the original number
803 - 509 = 294
294 ÷ 509 = 0.5776031434184676
0.5776031434184676 x 100 = 57.76%