Q: Paddy's Confidential has 600 cans of stew required to feed 40 people. How many cans would be needed to feed 30% fewer people?
A: If there are 40 people, each person gets 600 / 40 = 15 cans. Thirty percent of the total number of people present is 30 / 100 * 40 = 12. If there are 30% fewer people, the number of people who are to be fed is 40 - 12 = 28. Since each person is given 15 cans, twenty - eight people will need 15 * 28 = 420 cans. The answer is 420.

Q: Solomon collected three times as many cans as Juwan. Levi collected half of what Juwan collected. Solomon collected 66 cans. How many cans did the boys collect in all?
A: Solomon is 3 * Juwan so Juwan is 1 / 3 of Solomon = 66 / 3 = 22. Levi collected half of 22 = 11. Combined the boys collected 66 + 22 + 11 = 99 cans in all. The answer is 99.

Q: John's cow weighs 400 pounds. It increased its weight to 1.5 times its starting weight. He is able to sell the cow for $3 per pound. How much more is it worth after gaining the weight?
A:
The cow initially weighs 400 * 1.5 = 600 pounds. So it gained 600 - 400 = 200 pounds. So its value increased by 200 * $3 = $600. The answer is 600.