To find the amount of the tip we can use a rule of 3 when 22 represent the 100% so:
[tex]\begin{gathered} 22\to100 \\ x\to15 \end{gathered}[/tex]and the equation will be:
[tex]\begin{gathered} x=\frac{22\cdot15}{100} \\ x=3.30 \end{gathered}[/tex]So the tip was $3.30 dollars
