A tank

A tank is 7/9 full of water,1/5 of the tank is drawn in the morning, and 1/3 is drawn in the evening. What fraction of water is still in the tank?

Correct answer:

x =  11/45

Step-by-step explanation:

$$\begin{gathered} V_1=\frac{7}{9}\doteq 0.7778 \\ {V}_2=\frac{1}{5}=0.2 \\ {V}_3=\frac{1}{3}\doteq 0.3333 \\ x=V_1-V_2-V_3=\frac{7}{9}-\frac{1}{5}-\frac{1}{3}=\frac{35}{45}-\frac{9}{45}-\frac{15}{45}=\frac{35-9-15}{45}=\frac{11}{45}=0.2444 \end{gathered}$$

Try another example