find the average of 3/8, 6/7, and 2/5

find the average of these fractions 3/8, 6/7, and 2/5
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To find the average add all the items together and divide by the number of items. Lowest common denominator is 8*7*5=280, so the fractions added together are (3*35+6*40+2*56)/280=457/280. Divide this by 3 to get the average: 457/840.

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