51.86% is the change from 538 to 817
Calculation steps:
[( 817 - 538 ) ÷ 538] x 100 = 51.86%
Formula
Percentage change = [(817 - 538) / 538] x 100
Subtract the new number by the original number
817 - 538 = 279
279 ÷ 538 = 0.5185873605947955
0.5185873605947955 x 100 = 51.86%