The percentage equation can be written as,
[tex]\begin{gathered} \text{Percent}=\frac{Number}{Total}\times100 \\ \text{Number}=\frac{Percent\text{ }}{100}\times Total \end{gathered}[/tex]We have to find 20% of 55. So, percent=20% and total=55.
Now, putting the values in equation, we get
[tex]\text{Number}=\frac{20}{100}\times55=11[/tex]Therefore, the number is 11.