Answer: 3/5 and 3/7
Step-by-step explanation: In order to simplify the fractions you need to divide both the numerator and denominator by the same number in order to get it to its simplest form.
For the fraction 6/10, divide the top and bottom by 2, which is 3/5. This is the simplest form.
For the fraction 9/21, divide the top and bottom by 3, which is 3/7. This is the simplest form.
