Molly actually only wrapped 4 whole sandwiches. 16/4 is a fraction so you need to simplify it to find the answer of how many actual sandwiches she cut up and then wrapped. To find out the whole number you divide the numerator by the denominator. 16 divided by 4 is 4. The quotient is the amount of sandwiches she cut up. Molly made the mistake of counting each fourth as a whole sandwich.