Question 830772
Clarification is needed here.
BUT, assuming it's simple interest, and they're just looking for a division problem...
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$50 at 18% interest would be:
$50 * .18 = $9
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That's $9 per year.  12 months in a year.
Divide 9 by 12 to get:
9/12 = $0.75
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It doesn't seem like a lot, but when it becomes compounded interest, it multiplies quickly.  (Compounded interest is interest on the interest -- that's how credit card companies make their money.  They compound the interest daily.)