Question

find a rational number between 1 by 4 and 1 by 2

Answer 1

Btw 1/4 and 1/2

1st find their common denominator big enough to fit in 4 other rational numbers between them...my advice: take a big leap.
so 1/4 and 1/2 = 20/80 and 40/80 
So the rational numbers between them are (you can choose any ) - 21/80, 22/80, 23/80, 24/80 and so on