Answer:
12 students
Explanation:
So we know that 65% of students prefer math over the 35% of students that prefer science.
To find the answer we have to change the percentages to decimals and multiply by 40, which is the total number of students.
Math: 65%=0.65 , so 0.65 times 40=26 students
Science:35%=0.35, so 0.35 times 40=14 students
To find the difference, subtract 26 and 14, to get 12.
All in all, twelve students prefer math over science.
Hope I helped, have a nice day :)