Question

four rational numbers between 2/5 and 5/2

Answer 1

first make their denominator equal

25/10 = 5/2
4/10 =  2/5

4/10 5/10 6/10 7/10 ......... 25/10

simple 

mark best please. this answer is correct so no need to report abuse

Answer 2

It can also be done in an other way i.e 2/5= 0.4 & 5/2=2.5
So you can write any number b/w them like, 0.6,2.1,0.9,1.0 etc