1.3 and 1.4 can be written as 13/10 and 14/10
now to multiply the denominator and numerator of both the rational numbers to make the denominators same.
so we multiply both the rational numbers by 10.
it becomes 130/100 and 140/100.
now we have to find a number between 130 and 140.
we choose 131.
we write it as 131/100.