Answer:
40%
Explanation:
Step one:
Add together both when it rained and when it didn't
12 + 18 = 30
Step 2:
You are then going to divide the number of days it rained by the total amount of days are in April. (We got this by adding the two numbers above)
12/30
It will then give you the solution of 0.4
You are then going to move the decimal two places to the right.
This will give you 40%