85.57% is the change from 291 to 540
Calculation steps:
[( 540 - 291 ) ÷ 291] x 100 = 85.57%
Formula
Percentage change = [(540 - 291) / 291] x 100
Subtract the new number by the original number
540 - 291 = 249
249 ÷ 291 = 0.8556701030927835
0.8556701030927835 x 100 = 85.57%