First off, I would like to say that you aren't d**b! Always remember that asking for help is never d**b!
To change a fraction to a decimal, put the decimal over its place value. For example, if you had the decimal 0.7, you would put 7 over 10 to create the fraction
.
Lastly, always remember to simplify your answer!
Hope this helps! Have a great day! (: