Clarissa

Clarissa read 1/2 of a book in the morning and some more at night. By the end of the day, she still had 1/3 of the book left to read. How much of the book did Clarissa read at night?

Correct answer:

x =  1/6

Step-by-step explanation:

$$\begin{gathered} a=\frac{1}{2}+\frac{1}{3}=\frac{3}{6}+\frac{2}{6}=\frac{3+2}{6}=\frac{5}{6}\doteq 0.8333 \\ x=1-a=1-\frac{5}{6}=\frac{1\cdot 6}{6}-\frac{5}{6}=\frac{6}{6}-\frac{5}{6}=\frac{6-5}{6}=\frac{1}{6}=0.1667 \end{gathered}$$

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