If 12 eggs cost $2.04, then figure out how much 1 egg costs. You do that by dividing the total (2.04) by the amount (12) = 0.17. Take that number and multiply by how many eggs (18) and you'll get the total. ($3.06)
To find the cost of 18 eggs you first need to find the cost of 1 egg. 2.04/12= 0.17. A single egg cost 17 cents. Therefore 18 eggs 18(.17) would cost $3.06
