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3/4 x 4/5 = 12/20 = 6/10 = 3/5 or three fifths

Notice that the fours cancel out. Think about writing it as:

3 x (1/4) x 4 x (1/5) = 3 x [(1/4) x 4] x (1/5) = 3 x [1] x (1/5) = 3 x (1/5) = 3/5.

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8y ago

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