0
Anonymous
2/7 times 21 = 6
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2/21
2/3 x 4/7 is 8/21
2 / 21/24 = 2 2/7 or 2 and two sevenths
52/21 or 2 and 10/21
2/3 + 2/7 = 14/21 + 6/21 = 20/21