No it is not because 15 out of 30 is half but 12 out of 20 is more than half
Answer:

Step-by-step explanation:






Answer:
2k³ is the GCF.
Step-by-step explanation:
GCF of 
Finding the factors:
=10k³[Factoring 10k³]
=2×5×k×k×k
=6k³[Factoring 6k³]
=2×3×k×k×k
Common factors in 10k³ and 6k³.
=2×k³
=2k³
I think the answer is 6.6