Planting

The eighth graders took part in the planting of saplings in the forest for four days. On Monday, they planted a quarter of all the saplings they were supposed to plant. They planted a third of what they had left from Monday on Tuesday. On Wednesday, half of what they didn't have time to produce on Tuesday. What fraction of the trees did they have left for Thursday?

Final Answer:

d =  1/4

Step-by-step explanation:

$$\begin{gathered} a=\frac{1}{4}=0.25 \\ b=\frac{1}{3}\cdot (1-a)=\frac{1}{3}\cdot (1-\frac{1}{4})=\frac{1}{4}=0.25 \\ c=\frac{1}{2}\cdot (1-a-b)=\frac{1}{2}\cdot (1-\frac{1}{4}-\frac{1}{4})=\frac{1}{4}=0.25 \\ d=1-a-b-c=1-\frac{1}{4}-\frac{1}{4}-\frac{1}{4}=\frac{1}{4}=0.25 \end{gathered}$$

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