50.74% is the change from 538 to 811
Calculation steps:
[( 811 - 538 ) ÷ 538] x 100 = 50.74%
Formula
Percentage change = [(811 - 538) / 538] x 100
Subtract the new number by the original number
811 - 538 = 273
273 ÷ 538 = 0.5074349442379182
0.5074349442379182 x 100 = 50.74%