105.56% is the change from 270 to 555
Calculation steps:
[( 555 - 270 ) ÷ 270] x 100 = 105.56%
Formula
Percentage change = [(555 - 270) / 270] x 100
Subtract the new number by the original number
555 - 270 = 285
285 ÷ 270 = 1.0555555555555556
1.0555555555555556 x 100 = 105.56%