To find out how much sugar Ms. Johnson used from the canister when she baked the birthday cake, follow the steps below:
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Identify the amount of sugar in the canister: \[ \text{Amount of sugar} = \frac{7}{8} \text{ cups} \]
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Determine how much sugar she used: Ms. Johnson used \( \frac{1}{2} \) of the sugar in the canister. To find out how much that is, you need to multiply \( \frac{1}{2} \) by \( \frac{7}{8} \).
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Perform the multiplication of the fractions: \[ \text{Sugar used} = \frac{1}{2} \times \frac{7}{8} \]
To multiply fractions, multiply the numerators together and the denominators together: \[ \text{Numerator: } 1 \times 7 = 7 \] \[ \text{Denominator: } 2 \times 8 = 16 \]
Therefore, \[ \frac{1}{2} \times \frac{7}{8} = \frac{7}{16} \]
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Conclusion: Ms. Johnson used \( \frac{7}{16} \) cups of sugar to bake the birthday cake.
In summary, the steps to finding how much sugar she used are to multiply \( \frac{1}{2} \) by \( \frac{7}{8} \), resulting in \( \frac{7}{16} \) cups of sugar used.