1 tablespoon is equivalent to 3 teaspoons
To find the equivalence of 3 1/3 tablespoons in teaspoons, we can use the next proportion:
[tex]\frac{1\text{ tablespoon}}{3\frac{1}{3}\text{ tablespoon}}=\frac{3\text{ teaspoons}}{x\text{ teaspoons}}[/tex]Solving for x:
[tex]\begin{gathered} 1\cdot x=3\cdot3\frac{1}{3} \\ x=3\cdot3+3\cdot\frac{1}{3} \\ x=9+1 \\ x=10 \end{gathered}[/tex]Barbara must use 10 teaspoons
