Robert ate 3 pieces of a pizza and then felt that he should pay 1/4 of the cost because that's the fraction he ate. How many pieces was the pizza cut into ?

If 3 pieces is 1/4 of the whole pizza, then how many pieces makes us 4/4 of the pizza?

12; 3/12 is reduced down to 1/4

To determine the number of pieces the pizza was cut into, we can divide the amount that Robert ate (3 pieces) by the fraction of the total cost he wants to pay (1/4).

So, we need to calculate 3 / (1/4). Dividing by a fraction is equivalent to multiplying by its reciprocal, so we can rewrite the equation as 3 * (4/1).

Multiplying 3 by 4 gives us 12. Therefore, the pizza was originally cut into 12 pieces.