Multiplying and reducing fractions involves three steps:
1. multiply the numerators 2. multiply the denominators 3. reduce the answer (if necessary)
5/6 * 2/10 = 10/60 The GCF of 10 and 60 is 10. 10/60 = 1/6
1/7 * 3/5 = 3/35 3 and 35 have no common factors (other than 1). So, 3/35 cannot be reduced.
Now you get to try a few for yourself.