Question

Katherine bought à sandwich for 5 1/2 dollar and a adrink for $2.60.If she paid for her meal with a $ 10 bill how much money did she have left?

Answer 1

To find out how much Katherin have left we need to substrac the amount she spent:

`10-5(1)/(2)-2.6=10-5.5-2.6=1.9`

Therefore she has $1.9 left.

To do this same problem in fraction form we need to convert the 2.6 in fraction, to do this we multiply the number by 10 and divided by ten. Then:

`2.6\cdot(10)/(10)=(26)/(10)=(13)/(5)`

then we have:

`\begin{gathered} 10-5(1)/(2)-(13)/(5)=10-(11)/(2)-(13)/(5) \\ =(100-55-26)/(10) \\ =(19)/(10) \end{gathered}`

Therefore, the answer in decimal form is 19/10 dollars.