I think it's 5 because 9 can go into 51 5 times with a reminder of 1 5 and 1
The best method would be to factor.
Answer:
31.6%
Step-by-step explanation:
Let the percentage in % be p, then we can solve:
38 * p / 100 = 12
p/100 = 12/38
p = 1200/38 ≈ 31.6%