Answer:
32.4%
Step-by-step explanation:
To find the answer we need to consider that 37 students are the total of students in math, so:
37=100%
Now, because only 25 students went the next day, the number of students that didn't attend is:
37-25=12
This means that 12 out of 37 students is the decrease number, which in percentage is:
(12/37)*100%=32.4%