51.3% is the change from 538 to 814
Calculation steps:
[( 814 - 538 ) ÷ 538] x 100 = 51.3%
Formula
Percentage change = [(814 - 538) / 538] x 100
Subtract the new number by the original number
814 - 538 = 276
276 ÷ 538 = 0.5130111524163569
0.5130111524163569 x 100 = 51.3%