There are 15 tables in the school's cafeteria. Each table can seat 10 people. Usually, only 1/10 of the seats are left unseated. How many seats are usually taken?
The cafeteria can seat 15 x 10 = <<15*10=150>>150 people.
Usually, 150 x 1/10 = <<150*1/10=15>>15 seat are unseated.
Thus, 150 - 15 = <<150-15=135>>135 seats are usually taken.
#### 135