1. The problem states that 12 sheets weigh 40g. 2. We need to find how many sheets weigh 1g. 3. First, find the weight of one sheet by dividing the total weight by the number of sheets: $$\text{Weight per sheet} = \frac{40}{12} = \frac{10}{3} \text{ g} \approx 3.33 \text{ g}$$ 4. Now, to find how many sheets weigh 1g, divide 1g by the weight per sheet: $$\text{Number of sheets} = \frac{1}{\frac{10}{3}} = \frac{1 \times 3}{10} = \frac{3}{10} = 0.3$$ 5. Since the number of sheets can't be less than 1 to weigh 1g, actually 1 sheet weighs more than 1g, so sheets weighing 1g is less than 1 whole sheet, meaning it's a fraction of a sheet. 6. The question can be interpreted as the amount of sheet weight equivalent to 1g is about $0.3$ sheets, or in other words, the weight of one sheet is more than 1g. Final answer: Approximately $0.3$ sheets weigh 1g, meaning 1 sheet weighs about 3.33g.