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Darlene earned $6.75 interest on her savings account for a 15 month. What was the average amount of interest Darlene earned on her savings account per month

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Divide 6.75 by 15 to get the average since there were 15 months.
6.75 / 15 = 0.45
That means the average amount of interest Darlene earned per month is $0.45.
Hope this helps!
User Nat Dempkowski
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