Answer:
1. b, 2. d, 3. c, 4. a.
Step-by-step explanation:
4/7 goes to 1/7, because 1/7 is a part of 4/7
12/15 goes to 1/15 because 1/15 is the unit fraction of 12/15
6/9 goes to 1/9
and 1/3 goes to 2/3
