Question

A sugar bag contains 30 kg of sugar. After consuming $\frac{2}{3}$ of it, how much sugar is left in the bag?

Answer 1

$$\begin{gathered} \mathrm{Total}\mathrm{amount}\mathrm{of}\mathrm{sugar}\mathrm{in}\mathrm{the}\mathrm{bag}=30\mathrm{kg} \\ \frac{2}{3}\mathrm{of}30\mathrm{kg}=\frac{2}{3}\times 30=20\text{kg} \\ \Rightarrow \mathrm{Amount}\mathrm{of}\mathrm{sugar}\mathrm{consumed}=20\mathrm{kg} \\ \mathrm{Sugar}\mathrm{left}\mathrm{in}\mathrm{the}\mathrm{bag}=\mathrm{Total}\mathrm{amount}\mathrm{of}\mathrm{sugar}\mathrm{in}\mathrm{the}\mathrm{bag}-\mathrm{Amount}\mathrm{of}\mathrm{sugar}\mathrm{consumed} \\ \mathrm{Sugar}\mathrm{left}\mathrm{in}\mathrm{the}\mathrm{bag}=30-20=10\mathrm{kg} \end{gathered}$$