Find what two fractions that are between 3/5 and 4/5.

Answer 1

2/3 and 3/4 are the fractions with smallest denominators and numerators, between 3/5 and 4/5

there are an infinite number of other fractions in that same interval, such as 5/8 and 7/10. Other fractions in that interval have increasingly larger integers in the numerator and denominator, such as 11/16