Question

RITIN HAD 27/4 LITRES OF MILK OF WHICH HE SOLD 21/5 LITRES. HOW MUCH MILK IS LEFT WITH HIM

Answer 1

$$\begin{gathered} \mathrm{Hi}, \\ \mathrm{He}\mathrm{has}\frac{27}{4}\mathrm{litres}\mathrm{of}\mathrm{milk} \\ \mathrm{and}\mathrm{sold}\mathrm{quantity}=\frac{21}{5}\mathrm{litres} \\ \mathrm{so}\mathrm{quantity}\mathrm{of}\mathrm{milk}\mathrm{left}\mathrm{with}\mathrm{him}=\frac{27}{4}-\frac{21}{5} \\ =\frac{27\times 5-21\times 4}{20}=\frac{135-84}{20}=\frac{51}{20}\mathrm{litres} \end{gathered}$$