6.72% is the change from 506 to 540
Calculation steps:
[( 540 - 506 ) ÷ 506] x 100 = 6.72%
Formula
Percentage change = [(540 - 506) / 506] x 100
Subtract the new number by the original number
540 - 506 = 34
34 ÷ 506 = 0.06719367588932806
0.06719367588932806 x 100 = 6.72%