Answer :
if 25% is 51 students an easy way of finding it would be adding 51 4 times. so the answer should be 204. unless im wrong then im sorry.
25% is equal to 1/4. If 51 is 25% of the students, that means it is 1/4. To find the total amount of students who would choose summer, you multiply 51 x 4 and you get 204 students, give some/take some. Hope this helps!