29.09% is the change from 55 to 71
Calculation steps:
[( 71 - 55 ) ÷ 55] x 100 = 29.09%
Formula
Percentage change = [(71 - 55) / 55] x 100
Subtract the new number by the original number
71 - 55 = 16
16 ÷ 55 = 0.2909090909090909
0.2909090909090909 x 100 = 29.09%