Question 7913
{{{5&3/8-2&5/8}}}
Keep the same denominator, The only problem is you have to borrow from the whole number (5) and add 8 (denominator) to 3 so you can subtract from 5.
So you it would look like this
{{{4&11/8-2&5/8=2&6/8=2&3/4}}}

I hope that helps you

CharStar.