Step 1 : Introduction to the question "7. Christopher ordered an eighteen slice pizza from Crazy Joe's Pizzeria. For dinner, Chris ate 3 slices. In simplest form, what fraction of the pie did he eat?"
...1. 1/6 2. 1/18 3. 2/16 4. 1/4 Chris ate 3/18 of the pizza but to get it in simplest form you have to divide the numerator and denominator by a common factor which in this case is 3. Therefore, Chris ate 1/6 of the pie.