66.93% is the change from 502 to 838
Calculation steps:
[( 838 - 502 ) ÷ 502] x 100 = 66.93%
Formula
Percentage change = [(838 - 502) / 502] x 100
Subtract the new number by the original number
838 - 502 = 336
336 ÷ 502 = 0.6693227091633466
0.6693227091633466 x 100 = 66.93%