Question

7/10 + 1/3 ?

Answer 1

you need to write both
\[\frac{7}{10}\] and
\[\frac{1}{3}\] as equivalent fractions with the same denominator. any ideas on how to do this/

Answer 2

btw i am assuming that since you asked, you want the method and not just the solution. if you only need the solution of course you can use a calculator, or just type here
http://www.wolframalpha.com/input/?i=7%2F10%2B1%2F3