Question: Mark just got a new puppy that cost $10. He also bought enough food for 3 weeks. He knows the puppy eats 1/3 cup of food a day. A bag of food with 3.5 cups costs $2. How much did all of this cost him?
Answer with step-by-step thinking: He needs food for 21 days because 3 x 7 = 21. The puppy will eat 7 cups of food because 21 x (1 / 3) = 7. He needs 2 bags of food because 7 / 3.5 = 2. The food will cost him $4 because 2 x 2 = 4. It will cost $14 in total because 10 + 4 = 14.
So the answer is 14.

Question: Asia bought a homecoming dress on sale for $140. It was originally priced at $350. What percentage off did she get at the sale?
Answer with step-by-step thinking: Asia saved $350 - $140 = $210 on the dress. That means she saved $210 / $350 = 0.60 or 60% off on the dress.
So the answer is 60.

Question: Toby is counting goldfish in the local pond. He knows that only 25% of goldfish are at the surface and the rest are too deep below the surface to be able to see. If he counts 15 goldfish, how many are below the surface?
Answer with step-by-step thinking:
There are 60 goldfish because 15 / .25 = 60. 75% of the fish are below the surface because 100 - 25 = 75. There are 45 goldfish below the surface because 60 x .75 = 45.
So the answer is 45.