Question 646482
A car's gas tank can hold up to 17 gallons of gasoline;
 when driving on the highway, it gets 28 miles per gallon.
 If you've traveled 103 miles, how many gallons of gas have you used?"
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That fact that the car holds 17 gal is irrelevant here
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Divide the distance by the miles per gallon (which is what you did)
{{{103/28}}} = 3.6786 gallons used to drive 103 miles
:
:
you can check this, find how many miles you can go on 3.6786 gallon
if you get 28 mpg
3.6786 * 28 = 103 miles