The GCF of 21 and 12 is 3. Hope this helps! :)
<h2>-CloutAnswers</h2>
Answer:
c
Step-by-step explanation:
I am not sure
Fifty-one and seven tenths ~ or, simpler ~ fifty-one point seven.
I’m not really sure but I would have to guess 4.5 because all of the other numbers don’t have decimals