The gas mileage of a car is 28.16 miles per gallon. how many gallons per mile is this?

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Feb 14, 2018

Answer:

#1# gallon per #25/704# miles, or #1# gallon per about #0.0355# miles

Explanation:

We can set up a proportion :

#28.16/1 = 1/x#

We don't want decimals in a fraction, so multiply #1/28.16# by #100/100 (=1#).

#28.16/1*100/100#

#2816/100#

Now simplify:

#(2816-:4)/(100-:4)#

#704/25#

Back to the equation:

#704/25 = 1/x#

Cross-multiply:

#704x=25*1#

Divide both sides by #704#:

#x=25/704# or about #0.0355#

So, the answer is #25/704# or #0.0355# about gallons per mile.

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1
Feb 22, 2018

28.16 miles per gallon

Written mathematically we have:

28.16 miles = 1 gallon

Dividing by 28.16 on both sides we get:

1 mile = #(1-:28.16)# gallons

or, 1 mile = 0.0355114 gallons

:)>

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1
Feb 9, 2018

Answer:

An alternate approach...

Explanation:

We're told that we have a car that uses 1 gallon of gas to go 28.16 miles:

#"miles"/"gallon"=28.16/1#

What we want to know is how many gallons per mile:

#"gallon"/"miles"#

We already know the ratio, #28.16/1#, so we need to invert the fraction:

#1/28.16~=0.0355# gallons per mile

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