Question

3/7 and 5/7 between four rational number
why multiplication of 3
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Answer 1

Answer:

To find a 4 rational no. add 1 to 4 that will become 5 and then multiply 5 to both denominator and numerator of both the no. 3/7.5/5 and 5/7.5/5 .

Answer 2

Answer:

10/21 , 11/21 , 12/21 , 13/21 , 14/21

because there is no four rational number between them so if we multiply it with 3 then it is able to give four rational numbers.

I hope u understand and it helps you.