Question

Toby cuts a pizza into 6 equal slices. He eats half a slice. What fraction of the pizza has he eaten?

Answer 1

1/12th.

Slices are 1/6th of the pizza
Of indicates multiplication
So
1/6 x 1/2 = 1/12

Answer 2

The pizza is cut into 6 slices so each slice would be 1/6 of the pizza.

He at 1/2 of a slice:

1/6 x 1/2 = 1/12 of the pizza