5 to 6
10 to 12
15 to 18
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10:30, 20:60, 15:45 are three possible ratios
30 : 40 and 33 : 44 are two possible equivalent ratios.
4 to 10 8 to 20 20 to 100
They are: 10 to 42, 15 to 63 and 20 to 84
3 to 10 6 to 20 12 to 40