When dividing fractions, you can find the quotient by multiplying them with the second fraction reciprocated. e.g. 5/6 divided by 7/8 = 5/6 times 8/7. Why does this work?
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Because:
If a : x = b, then what is y such that a . y = b ?
I mean express y in terms of x and you will see why it works.
peter.petrov
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http://math.stackexchange.com/questions/71157/proof-of-dividing-fractional-expressions
– AlexMayle Mar 24 '15 at 17:14