Solve for r
r = \frac{48}{5} = 9\frac{3}{5} = 9.6
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r=12\times \frac{4}{5}
Multiply both sides by \frac{4}{5}, the reciprocal of \frac{5}{4}.
r=\frac{12\times 4}{5}
Express 12\times \frac{4}{5} as a single fraction.
r=\frac{48}{5}
Multiply 12 and 4 to get 48.
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