Question

find any five rational numbers between 2/5 and 1/2

Answer 1

2.4 ,2.3 ,2.2 ,2.1 , 1.3 , 1.4

Answer 2

For the numbers -2/5 and 1/2, the LCM is 10(from the denominators 5 and 2, we get 5*2=10)

so:
-2/5 = -4/10 = -8/20
1/2 = 5/10 = 10/20

so the rational numbers lying between -2/5 and 1/2 = the rational numbers lying between -8/20 and 10/20

= -7/20, -6/20, -5/20, -4/20, -3/20