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.
#### 800