Answer:
13.3
Explanation:
Since 8.5 fell in February and 5.1 fell in March. We can add these two numbers together to see what the total is combined normally.
8.5 + 5.1 = 13.6
The record was 26.9, so we'll take this number and subtract it from 13.6 to see how much more fell in one day than the normal
26.9-13.6= 13.3