Question

rational number between 1/2 and 3/5 is:

Answer 1

1/2= 1*20/2*20=20/40
3/5=3*8/5*8=24/40
Therefore
Rational numbers between 1/2=(20/40) and 3/5=(24/40)
Are 21/40,22/40,23/40

Answer 2

Here is your solution

Given :-

rational number between 1/2 and 3/5

Firstly

both numerator and denominator multiply by 20 in 1/2

$\frac{1}{2} \times \frac{20}{20} = \frac{20}{40}$
Now

both numerator and denominator multiply by 8 in 3/5

$\frac{3}{5} \times \frac{8}{8} = \frac{24}{40}$

Rational number between 20/40 and 24/40 are 21/40, 22/40 ,23/40

Hope it helps you