4/17 is in its simplest form.
4/21
In its simplest form... 3/4
2 and 8 are both divisible by 2, so the reduced form is (2/2) / (8/2) = 1/4.
It's 4/35. It can't be reduced (simplified), because 4 and 35 have no common factor.
It's already in simplest form.
4/17 is in its simplest form.
4/21
In its simplest form... 3/4
4/21 is in its simplest form.
3 and 4/7 cannot be reduced further.
4/15 is the most reduced form of that fraction with integer numerator and denominators.
1/4 is in its simplest form: it cannot be reduced further.
2 and 8 are both divisible by 2, so the reduced form is (2/2) / (8/2) = 1/4.
4/25 is it's simplest form. It cannot be reduced further, as there are no other numbers that you can evenly divide into both the numerator and denominator.
It's already in its simplest form - since the fraction 6/7 cannot be reduced any further.
It's 4/35. It can't be reduced (simplified), because 4 and 35 have no common factor.