23.64% is the change from 55 to 68
Calculation steps:
[( 68 - 55 ) ÷ 55] x 100 = 23.64%
Formula
Percentage change = [(68 - 55) / 55] x 100
Subtract the new number by the original number
68 - 55 = 13
13 ÷ 55 = 0.23636363636363636
0.23636363636363636 x 100 = 23.64%