2015-09-16T20:57:58+08:00

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Rename 3 and 2/10 as a improper fraction.

multiply the 10 (the denominator), and the 3 (the whole number). To this product, add the 2 (the numerator)
giving 32, to form the new numerator, and use the 10 as the new denominator.

So 3 2/10 = 32/10

Now, 32/10 x 4/1 = 128/10

Reducing, we got 12 and 4/5 as the answer.
2015-09-16T21:04:11+08:00

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3 2/10 x 4/1 =
32/10 x 4/1 = 128/10 or 12 8/10 divide by 2

=12 4/5