Question

Meiling has 1 1/4 liter of orange juice. She drinks 1/3 liter. How much orange juice does she have left?

Answer 1

Meiling has 1 1/4 liter of orange juice.

Express mixed fraction 1 1/4 into fraction :

$\begin{gathered} 1\frac{1}{4}=\frac{1\times4+1}{4} \\ 1\frac{1}{4}=\frac{5}{4} \end{gathered}$

So,

Meiling has 1 1/4 liter of orange juice = 5/4 liter juice

She drinks 1/3 liter

Amount of juice used = 1/3 liter

Left juice = Total amount of juice - Amount of juice drank by Meiling

Left juice = 5/4 - 1/3

$\begin{gathered} \frac{5}{4}-\frac{1}{3} \\ \text{ LCM of 4 \& 3} \\ \frac{5}{4}-\frac{1}{3}=\frac{3\times5-4\times1}{12} \\ \frac{5}{4}-\frac{1}{3}=\frac{15-4}{12} \\ \frac{5}{4}-\frac{1}{3}=\frac{11}{12} \end{gathered}$

Amount of juice left is 11/12 liter

Answer : 11/12 liter