42 to 18 is 42:18 is 42/18
Which is 2 1/3
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42/100
60-42 = 18
7.05 / 42 = 1 / 5.957 (rounded)
12 × ratio = -18 → ratio = -18/12 = -3/2 = -1.5 Checking: -18 × ratio = -18 × -3/2 = 27 as required The common ratio is -3/2 (or -1.5)
The ratio works out as 7 to 60