To determine how many cups of almonds Lewis needs if he is using 3 cups of chocolate chips, we can set up a proportion based on the original recipe.
The recipe states:
- 1/8 cup of almonds for every 3/4 cup of chocolate chips.
First, we find out how many times 3/4 cups fits into 3 cups:
\[ \text{Number of 3/4 cup servings in 3 cups} = \frac{3 \text{ cups}}{3/4 \text{ cup}} = 3 \times \frac{4}{3} = 4. \]
Since Lewis is making 4 portions of the original recipe, we need to multiply the amount of almonds by 4:
\[ \text{Total almonds needed} = 4 \times \left(\frac{1}{8} \text{ cup}\right) = \frac{4}{8} \text{ cups} = \frac{1}{2} \text{ cup}. \]
Now to express that in decimals:
\(\frac{1}{2} = 0.5\) cups.
Rounded to the nearest tenth, 0.5 cups remains 0.5 cups.
Thus, the correct answer is A: 0.5 cups.
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