63.15% is the change from 502 to 819
Calculation steps:
[( 819 - 502 ) ÷ 502] x 100 = 63.15%
Formula
Percentage change = [(819 - 502) / 502] x 100
Subtract the new number by the original number
819 - 502 = 317
317 ÷ 502 = 0.6314741035856574
0.6314741035856574 x 100 = 63.15%