54.78% is the change from 502 to 777
Calculation steps:
[( 777 - 502 ) ÷ 502] x 100 = 54.78%
Formula
Percentage change = [(777 - 502) / 502] x 100
Subtract the new number by the original number
777 - 502 = 275
275 ÷ 502 = 0.547808764940239
0.547808764940239 x 100 = 54.78%