Question

find 3 rational numbers between 2/5 and 3/7

Answer 1

2/5                 and   3/7

14/35            and 15/35

14/35*10/10 and 15/35*10/10

140/350       and 150/350

141/350,142/350 and 143/350 are the irrational.....

Answer 2

three rational nos between 2/5 and 3/7 are
$\frac{2}{5} , \frac{3}{7}$
=$\frac{14}{35} , \frac{15}{35}$
multiply by 4 (3+1)
=[tex] \frac{56}{140}, \frac{60}{140} [/tex]

THEREFORE
57,58,59/140 are 3 rational nos between tem