51.11% is the change from 540 to 816
Calculation steps:
[( 816 - 540 ) ÷ 540] x 100 = 51.11%
Formula
Percentage change = [(816 - 540) / 540] x 100
Subtract the new number by the original number
816 - 540 = 276
276 ÷ 540 = 0.5111111111111111
0.5111111111111111 x 100 = 51.11%