54.47% is the change from 503 to 777
Calculation steps:
[( 777 - 503 ) ÷ 503] x 100 = 54.47%
Formula
Percentage change = [(777 - 503) / 503] x 100
Subtract the new number by the original number
777 - 503 = 274
274 ÷ 503 = 0.5447316103379721
0.5447316103379721 x 100 = 54.47%