A baker can either bake 100 big cookies or 150 small cookies using the same amount of ingredients. After baking 80 big cookies, what is the maximum number of small cookies he can bake with the remaining ingredients?

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Worked solution

1. Find the fraction of ingredients remaining after baking 80 big cookies

Fraction of ingredients used = $\frac{80}{100} = \frac{4}{5}$
Fraction of ingredients remaining = $1 - \frac{4}{5} = \frac{1}{5}$

2. Calculate the number of small cookies that can be baked with the remaining ingredients

Number of small cookies = $\frac{1}{5} \times 150 = 30$

Answer

$30$ (option 2)

AI analysis — may contain mistakes.

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