50.56% is the change from 540 to 813
Calculation steps:
[( 813 - 540 ) ÷ 540] x 100 = 50.56%
Formula
Percentage change = [(813 - 540) / 540] x 100
Subtract the new number by the original number
813 - 540 = 273
273 ÷ 540 = 0.5055555555555555
0.5055555555555555 x 100 = 50.56%