What is a fraction between 2/3 and 3/4 and whose denominater is 10?

hi! my 10 year old daughter is very high in math. i wanted to make a challenging question for her, and I can't even find the answer for this one: what is a fraction between 2/3 and 3/4. by the way it can'tbe an improper or mixed fraction. it has to be a whole # 4 the numerator and denomanater. oh and explain how u solved it.