Plz HELP with Rational Numbers

I need to help My little sister with her homework and I can't remeber this stuff! Ok so it tells you to
"Find a rational number(in fraction form) between the numbers 5/14 and 2/5. Plz tell me the awnser and how you figured it out!!!

Get them into the same form...

5/14 is the same as 5*5/14*5=25/70
2/5 is the same as 2*14/5*14=28/70

So you've got a choice between 26/70 and 27/70.

(Or if you wanted to be obscure, you could find bigger equivalent fractions and choose them)

Just take the average of the two numbers If a and b are rational, a
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This question is simply irrational