53.15% is the change from 508 to 778
Calculation steps:
[( 778 - 508 ) ÷ 508] x 100 = 53.15%
Formula
Percentage change = [(778 - 508) / 508] x 100
Subtract the new number by the original number
778 - 508 = 270
270 ÷ 508 = 0.531496062992126
0.531496062992126 x 100 = 53.15%