PROBLEM
Total
16 cheddar cheese
8 mozzarella cheese
Solution
He uses
[tex]\begin{gathered} 5\frac{1}{2}\text{ of cheddar out of 16} \\ 3\frac{1}{3}\text{ of mozzarella out of 8} \end{gathered}[/tex][tex]\begin{gathered} \\ \text{Cheddar left = 16 - 5}\frac{1}{2}\text{ = 10}\frac{1}{2} \end{gathered}[/tex][tex]\text{Mozzarella left = 8 - 3}\frac{1}{3}\text{ = 4}\frac{2}{3}[/tex][tex]\begin{gathered} \\ \text{Total ch}eese\text{ left } \\ = \end{gathered}[/tex][tex]\begin{gathered} \\ =\text{ 10}\frac{1}{2}\text{ - 4}\frac{2}{3} \end{gathered}[/tex][tex]=\text{ 5}\frac{5}{6}[/tex]