SOLUTION: Mark car consume 15 liters of gasoline to travel 150 kilometers.At that rate how much gasoline will his car use to travel 400 kilometers? Lucy is 12 years older than her sister

Question 1168237: Mark car consume 15 liters of gasoline to travel 150 kilometers.At that rate how much gasoline will his car use to travel 400 kilometers?
Lucy is 12 years older than her sister Macy four years from now.Macy will be two third as old as Lucy.How old are they now?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
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Mark car consume 15 liters of gasoline to travel 150 kilometers.At that rate how much gasoline will his car use to travel 400 kilometers?
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-------very simple proportion

For the next one maybe you mean like:
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Lucy is 12 years older than her sister Macy. Four years from now, Macy will be two third as old as Lucy.
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Simple algebra, or maybe just arithmetic
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