Answer:
- Ariana percent: 85
- Andres percent: 91
Explanation:
You want the percent of powdered lemon mix in two recipes:
- Ariana: 3 c water, 17 c lemon mix
- Andres: 1 c water, 20 c lemon mix
Percent
The desired percent can be found from ...
(lemon mix)/(water + lemon mix) × 100%
For Ariana, this is ...
17/(3 +17) × 100% = 17/20 × 100% = 85%
For Andres, this is ...
10/(1 +10) × 100% = 10/11 × 100% ≈ 91%
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Additional comment
There aren't many powders that will dissolve 10 cups of powder in 1 cup of water. Even if there were, the resulting combination would not have a volume of 11 cups. This might be a mildly interesting math problem, but it has little relevance to any real-world lemonade recipe.
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