The number of students at marita's school decreased to 90% of last years number. this year, there were 1,350 students. how many students were there last year?

To determine how many students were at Marita's school last year with the provided information, the equation would be 1,350 = 90%(x). Another way to write it is 0.9x = 1,350. Divide both sides by 0.9, and the answer is 1,500. There were 1,500 students at the school last year.