[Question]: The price per organic egg is 50 cents. The price of a tray of eggs that contains 30 eggs is $12. How much can you save, in cents, per egg if you buy a tray versus individual eggs?
[Answer]: The price per egg in a tray is $12 / 30 eggs = $0.4 / egg. The equivalent of $0.4 in cents is $0.4 x 100 cents / dollar = 40 cents. Hence, you can save 50 cents - 40 cents = 10 cents per egg if you buy a tray.
So the answer is 10.

[Question]: James decides to cut down some trees. In the first 2 days, he cuts down 20 trees each day. For the next 3 days his 2 brothers help him cut down trees. They cut 20% fewer trees per day than James. How many total trees were cut down?
[Answer]: He cuts down 2 * 20 = 40 trees by himself. Each of his brothers cuts down 20 * .2 = 4 fewer trees per day. So they each cut down 20 - 4 = 16 trees. So for the next 3 days they cut down 20 + 16 * 2 = 52 trees per day. So they cut down 40 + 52 * 3 = 196 trees.
So the answer is 196.

[Question]: Daisy's milk cow provides 16 cups of milk per day. 75% of the milk is consumed by Daisy's kids. Daisy uses 50% of the remaining milk to cook with. How much milk is left over?
[Answer]:
The cow provides 16 cups of milk per day and the kids consume 75% so they drink 16 * .75 = 12 cups of milk. The cow provides 16 cups of milk and the kids drink 12 cups leaving 16 - 12 = 4 cups of milk. Daisy uses 50% of the remaining 4 cups of milk to cook with so she uses .50 * 4 = 2 cups of milk. She had 4 cups of milk and used 2 cups to cook with so that leaves 4 - 2 = 2 cups of milk.
So the answer is 2.