Answer:
27 ounces of strawberry
Explanation:
Let x represent the amount of strawberry needed.
We can go ahead and solve for x by setting up proportions as follows;
[tex]\begin{gathered} 3\text{ ounces of strawberry}\rightarrow\frac{1}{3}\text{ cups of blackberry} \\ x\rightarrow3\text{ cups of blackberry} \\ \frac{x}{3}=3\times3 \\ x=9\times3 \\ x=27\text{ ounces of strawberry} \end{gathered}[/tex]