Answer:
=B2*B3/1200
Step-by-step explanation:
Assuming the loan amount is in cell B2,
The annual interest would be B2*B3/100.
Dividing that by 12 to get the month amount, you get =B2*B3/1200
i.e., the 1200 takes care of the percent (divide by 100) and the 12 months (divide by 12) all in one go.