18.42% is the change from 456 to 540
Calculation steps:
[( 540 - 456 ) ÷ 456] x 100 = 18.42%
Formula
Percentage change = [(540 - 456) / 456] x 100
Subtract the new number by the original number
540 - 456 = 84
84 ÷ 456 = 0.18421052631578946
0.18421052631578946 x 100 = 18.42%