False
Let’s take 5/6 (first rational) and 15/18 (second rational)
As given both the rationals have different numerators.
Since, 15 and 18 have 3 in common hence,
⇒ 15/18 = 5/6
⇒ 5/6 (second rational) = 5/6 (first rational )
Hence, two rational with different numerators can be equal.