55.38% is the change from 502 to 780
Calculation steps:
[( 780 - 502 ) ÷ 502] x 100 = 55.38%
Formula
Percentage change = [(780 - 502) / 502] x 100
Subtract the new number by the original number
780 - 502 = 278
278 ÷ 502 = 0.5537848605577689
0.5537848605577689 x 100 = 55.38%