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Answer:

21 miles per gallon would be the unit rate

Step-by-step explanation:

In order to make 1/3 equal 1 you would have to multiply 1/3 by 3 Giving you 21 / 1 3

Answer:

21 miles per gallon would be the unit rate

Step-by-step explanation:

In order to make 1/3 equal 1 you would have to multiply 1/3 by 3 Giving you 21 / 1 3