Question

Find a rational number between -1/4 and 2/5

Answer 1

`s =(3)/(40)`

Explanation:

Let find the middle point between both rationals. That is to say:

`s = (-(1)/(4)+(2)/(5) )/(2)`

`s = ((-5+8)/(20) )/(2)`

`s =(3)/(40)`