50.19% is the change from 540 to 811
Calculation steps:
[( 811 - 540 ) ÷ 540] x 100 = 50.19%
Formula
Percentage change = [(811 - 540) / 540] x 100
Subtract the new number by the original number
811 - 540 = 271
271 ÷ 540 = 0.5018518518518519
0.5018518518518519 x 100 = 50.19%