To make raspberry lemonade, Rosie can determine the amount of raspberry needed based on the total number of cups of lemonade she plans to prepare. The ratio is 2 scoops of raspberry for every 5 cups of lemonade.
Here's how she can calculate the necessary amounts:
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Define the total amount of lemonade: If she decides how many cups of lemonade she wants to prepare, she'll substitute that number into the formula.
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Calculate the scoops of raspberry needed: Use the ratio to scale up the amount of raspberry based on the number of cups of lemonade. The ratio can be expressed as follows:
\[ \text{Scoops of raspberry} = \left(\frac{2 \text{ scoops}}{5 \text{ cups}}\right) \times \text{Total cups of lemonade} \]
Example Calculations
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If Rosie wants to make 10 cups of lemonade:
\[ \text{Scoops of raspberry} = \left(\frac{2}{5}\right) \times 10 = 4 \text{ scoops} \]
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If she wants to make 15 cups of lemonade:
\[ \text{Scoops of raspberry} = \left(\frac{2}{5}\right) \times 15 = 6 \text{ scoops} \]
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If she wants to make 25 cups of lemonade:
\[ \text{Scoops of raspberry} = \left(\frac{2}{5}\right) \times 25 = 10 \text{ scoops} \]
By following this approach, Rosie can easily adjust the amount of raspberry based on her needs for the party!