Part A: 1 1/2 Gallons are left.
3/4 + 1/4 = 1 + 1/2 = 1 1/2
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You need to
Do a
Proportion,
With the
Numerator
Changed to
"20" and the
Denominator
Changed to
"50" I think.
You know
how to do a
proportion,
right?
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1/4 x 4/7
do the top numbers first. 1 x 4 is 4do bottom numbers next 4 x 7 is 28
that leaves you with 4/28. But you have to reduce.
4/28 = 2/14 = 1/7 (notice I just cut both the top and bottom numbers in half each time I reduced until I couldn't reduce any more).
So, final answer is 1/7
3.85 if you divide the total cost by the number of gallons you should get your answer hope this helped