54.98% is the change from 502 to 778
Calculation steps:
[( 778 - 502 ) ÷ 502] x 100 = 54.98%
Formula
Percentage change = [(778 - 502) / 502] x 100
Subtract the new number by the original number
778 - 502 = 276
276 ÷ 502 = 0.549800796812749
0.549800796812749 x 100 = 54.98%