4 fifths and 1 tenth can be represented as fractions.
4/5 and 1/10
To find out how much he uses per day, we must subtract 4/5 from 1/10. BUT, before we do that, we must create a common denominator.
1/10 cannot be reduced, but 4/5 can be multiplied by 2 to make 8/10.
Now we can perform our equation:
[tex]8/10 - 1/10 = 7/10[/tex]
He would have 7/10 of gas left after one day. If this went on, his fuel would last for 8 total days.
