How to get answer by Mimiwhatsup (In Decimal Form):

Answer in Fraction Form: 
A/Wall if you have 20 and 30 that box is missing # so you will need to times and you will get something like this 20×30=60 and that's the missing #
B/Its going to be about 768 so you need to times and if you don't get 768
The answer is 0.08571428571
The answer is B12 hope this helped