Explanation:
Given that for one cake the amount of milk used is
[tex]1cake=1\frac{1}{2}cups[/tex]
Let number of cup sof milk to be used of 2 1/2 cakes be represented as
[tex]x[/tex]
By applying the comination below, we will have th expression as
[tex]\begin{gathered} 1cake=1\frac{1}{2}cups \\ 2\frac{1}{2}cakes=x \end{gathered}[/tex]
Cross multiply, we will have
[tex]\begin{gathered} 1\times x=1\frac{1}{2}\times2\frac{1}{2} \\ x=\frac{3}{2}\times\frac{5}{2} \\ x=\frac{15}{4} \\ x=3\frac{3}{4}cups \end{gathered}[/tex]
Hence,
The total milk he will need for 2 1/2 cakes will be
[tex]3\frac{3}{4}\text{ }cups\text{ }of\text{ }milk[/tex]
