Q: Nikka has a 100 stamp collection. Thirty-five percent of her stamps are Chinese, 20% are US stamps, and the rest are Japanese stamps. How many Japanese stamps does Nikka have?
A: Nikka has 100 x 35 / 100 = 35 Chinese stamps. She has 100 x 20 / 100 = 20 US stamps. So, Nikka has 35 + 20 = 55 stamps that are not Japanese. Thus, Nikka has 100 - 55 = 45 Japanese stamps. The answer is 45.

Q: Joy has 250 feet of tape. She wants to wrap the tape around a field that is 20 feet wide and 60 feet long. How much tape will Joy have left over after wrapping tape around the field once?
A: The perimeter of the field is 20 + 20 + 60 + 60 = 160 feet. Joy will have 250 - 160 = 90 feet of tape left over. The answer is 90.

Q: Larry spends half an hour twice a day walking and playing with his dog. He also spends a fifth of an hour every day feeding his dog. How many minutes does Larry spend on his dog each day?
A:
Larry spends 30 * 2 = 60 minutes per day walking his dog. Larry spends 60 / 5 = 12 minutes every day feeding his dog. Larry spends 60 + 12 = 72 minutes per day on his dog. The answer is 72.