Hi Dragon,
$$As a fraction 22 out of 120 is $\frac{22}{120}$\\
and if you want to change a fraction to a percentage then you have to multiply by 100.\\
$\frac{22}{120}\times 100=18.33333333...\%$\\
Rounded to 1 decimal place this is 18.3\%$$
Does that make more sense now Dragon?
Oh sorry, I thought you needed more explanation - I didn't read what you said properly.