Answer:
A
Step-by-step explanation:
4/6 is 2/3. 8/12 is 2/3, therefore they are proportional.
b. 14/ 21 is 2/3. 9/12 is 3/4, so the two are not proportional.
c. 5/7 doesn't simplify and 10/12 is 5/6, so they are no proportional.
d. 9/15 is 3/5. 12/18 is 2/3, so they are not proportional.
