a container tht can hold 12 litres is 3/4 full.how much will it contain after 4 litres have been poured out of it?
Hello,
the container holds $\displaystyle \frac{3}{4}$ of 12 litres. This of is translated by "multiply!" with your sort of problems.
Therefore the container holds:
$\displaystyle \frac{3}{4} \cdot 12 = 9 \text{ litres}$ . Now there are poured off 4 litres. That means the final content is:
$\displaystyle 9\text{ litres} - 4\text{ litres} = 5\text{ litres}$