Question

Find an irrational number between 5/7 and 7/9

Answer 1

get the lcm

5*9/7*9
= 45/63

7*5/9*5
= 35/45

so a irrational no. between them is: 36/45 , 42/45  ,  39,45

Answer 2

5/7 = .714285714285....
7/9 = .777777777777....
so an irrational no. between .714285714285... and .77777777... can be
.7575757575..... since it comes between the two no.