In my school, the number of students has increased by 20% this year. The number of students this year is 960. How many students were there last year?
Let X be the number of students last year. The number of students this year is X+X*20% = 960.
Combining like terms, we get X*1.2 = 960.
Dividing both sides by 1.2, we get X = 800 students.

<result>800</result>