Q26. Divide the sum of 5/21 and 4/7 by their difference?
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5/21 + 4/7 = 5 + 12/21 = 17/21
5/21 - 4/7 = 5-12/21 = -7/21
17/21 รท -7/21 =-17/7
5/21 - 4/7 = 5-12/21 = -7/21
17/21 รท -7/21 =-17/7
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