We have 45, 6, 12, and 10. We can cancel out a factor of 6 from 45 and 6, leaving us with 7.5 and 1. We can also cancel out a factor of 2 from 12 and 10, leaving us with 6 and 5. Multiplying across, we get $\frac{7.5 \cdot 1}{6 \cdot 5} = \frac{7.5}{30} =
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