Cereals

Cole and Carl share an 18-ounce box of cereal. By the end of the week, Cole has eaten 1/6 of the box, and Carl has eaten 2/3 of the box of cereal. How many ounces are left in the box?

Final Answer:

x =  3 oz

Step-by-step explanation:

$$\begin{gathered} a=18\text{oz} \\ b=\frac{1}{6}\cdot a=\frac{1}{6}\cdot 18=\frac{1\cdot 18}{6}=\frac{18}{6}=3\text{oz} \\ c=\frac{2}{3}\cdot a=\frac{2}{3}\cdot 18=\frac{2\cdot 18}{3}=\frac{36}{3}=12\text{oz} \\ x=a-b-c=18-3-12=3\text{oz} \end{gathered}$$

Try another example