In the cafeteria 100 milk cartons were put out for breakfast.at the end of breakfast 27 remained

And your question is?

not sure but I got 100:27

To find out how many milk cartons were consumed during breakfast, you can subtract the number of remaining cartons from the initial number of cartons.

Here's the equation:

Initial number of cartons - Remaining cartons = Consumed cartons

Using the information given in the question:

100 - 27 = 73

So, 73 milk cartons were consumed during breakfast.