# Math

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The interest rate on an auto loan in May was 12 %. By September the rate was up to 14 %. How many percentage points did the interest rate increase over the period?
How would I begin this?

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would this be 1.68%

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14%-12% = 2 percentage points.

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it is actually 14 1/4% and 12 3/8%

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sorry I forgot to insert the fraction

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Ye gads! Why didn't you post the correct figures in your first post?

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would i subtract 12 3/8% from 14 1/4%?

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sorry Ms. Sue I didn't read the problem correctly

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Yes, 14 1/4 - 12 3/8 = ??

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the answer I got was 2 5/8

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is this correct DrBob

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Yes.

14 1/4 - 12 3/8 =
14 2/8 - 12 3/8 =
13 10/8 - 12 3/8 = 1 7/8

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The easier way is to convert the fractions to decimals and run it through a calculator.

14 1/4 = 14.25
12 3/8 = 12.375

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hmmmm how did you get 13 10/8?

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ok.... thank you

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I don't see a 13 10/8 anywhere in the answers.
Do it as Ms Sue did.
14 1/4 = 14.25
12 3/8 = 12.375
14.25 - 12.375 = 1.875
OR
convert fractions.
14 1/4 = 57/4 = 114/8
12 3/8 = 99/8
114/8 - 99/8 = 15/8 = 1 7/8 and if you divide 7/8 on the calculator you get .875 so 1 7/8 = 1.875 and the two methods give the same answer.

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thank you

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