(7/15)/(4/7)
7 to divide fractions means you multiply by the reciprical
--- of the denominator.
15
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4 The reciprical is the inversion... 4/7 becomes 7/4
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7
(7/15) * (7/4) multiply across the top and bottom to get
(7 * 7) / (15 * 4) = 49 / 60