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Enzo's favorite chocolate chip cookie recipe calls for 1 teąspoon of salt for every
2(1)/(4) cups of flour. He currently has
1(1)/(2) cups of flour in his flour jar and
4(1)/(2) cups of flour in a bag. If Enzo wants to use up all of his flour to make chocolate chip cookies, how many teaspoons of salt does he need?

Enzo's favorite chocolate chip cookie recipe calls for $1$ teąspoon of salt for every $2 \frac{1}{4}$ cups of flour. He currently has $1 \frac{1}{2}$ cups of flour in his flour jar and $4 \frac{1}{2}$ cups of flour in a bag. If Enzo wants to use up all of his flour to make chocolate chip cookies, how many teaspoons of salt does he need?

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Solve proportions: word problems

Full solution

Q. Enzo's favorite chocolate chip cookie recipe calls for

1

teąspoon of salt for every

2 \frac{1}{4}

cups of flour. He currently has

1 \frac{1}{2}

cups of flour in his flour jar and

4 \frac{1}{2}

cups of flour in a bag. If Enzo wants to use up all of his flour to make chocolate chip cookies, how many teaspoons of salt does he need?

Calculate total flour: Enzo has $1\left(\frac{1}{2}\right)$ cups of flour in his flour jar and $4\left(\frac{1}{2}\right)$ cups in a bag. Let's add them up to find the total amount of flour. $\newline$ $1\left(\frac{1}{2}\right) + 4\left(\frac{1}{2}\right) = 1 + \frac{1}{2} + 4 + \frac{1}{2}$ $\newline$ $= 5 + 1$ $\newline$ $= 6$ cups of flour.
Determine salt amount: The recipe calls for $1$ teaspoon of salt for every $2(1/4)$ cups of flour. Let's find out how many times $2(1/4)$ goes into $6$ cups of flour. $\newline$ $6 \div 2(1/4) = 6 \div 2.25$ $\newline$ $= 2.666\ldots$
Round down for teaspoons: Since we can't have a fraction of a teaspoon of salt, we'll round down to the nearest whole number. Enzo needs $2$ teaspoons of salt for the flour he has.

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