Answer:
the answer might be D but I can't verifi because I can't see full screen
Answer:
A
Step-by-step explanation:
← divide numerator/ denominator by 4
= 
Thus A form a proportion
≠ 
Thus B is not a proportion
← divide numerator/ denominator by 4
=
≠ 
Thus C is not a proportion
≠ 
Thus D is not a proportion
1/2 - 5/12= 6/12 - 5/12 = 1/12