61.11% is the change from 18 to 29
Calculation steps:
[( 29 - 18 ) ÷ 18] x 100 = 61.11%
Formula
Percentage change = [(29 - 18) / 18] x 100
Subtract the new number by the original number
29 - 18 = 11
11 ÷ 18 = 0.6111111111111112
0.6111111111111112 x 100 = 61.11%