3 years ago

A recipe takes 90 minutes to make 25% of the time he spent preparing the ingredients how many minutes are spent preparing

Mathematics

1 answer:

gizmo_the_mogwai [7]3 years ago

5 0

25% * 90 minutes is 22.5 22.5 minutes

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Notice that the denominators are 3 and 7, which are factors of 21.

So express all the fractions with denominator 21:

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by Thursday $\frac{3}{21}+\frac{7}{21}+\frac{6}{21} = \frac{3+7+6}{21}= \frac{16}{21}$ of the tickets was sold.

Answer: $\frac{16}{21}$

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