Solve each problem. If you get stuck, consider using the double number line diagrams.

1. During a basketball practice, Mai attempted 40 free throws and was successful on 25% of them. How many successful free throws did she make?

   

   A double number line with 7 evenly spaced tick marks. The top number line is labeled “free throws” and the first tick mark is labeled 0. The other tick marks are unlabeled. The bottom number line is not labeled and starting with the first tick mark 0, 25 percent, 50 percent, 75 percent, 100 percent, 125 percent, and 150 percent are labeled.

2. Yesterday, Priya successfully made 12 free throws. Today, she made 150% as many. How many successful free throws did Priya make today?

   

   A double number line with 7 evenly spaced tick marks. The top number line is labeled “free throws” and the first tick mark is labeled 0. The other tick marks are unlabeled. The bottom number line is not labeled and starting with the first tick mark 0, 25 percent, 50 percent, 75 percent, 100 percent, 125 percent, and 150 percent are labeled.

A bottle of orange juice contains 200 milligrams of vitamin C, which is 250% of the daily intake recommended for adults.

What is 100% of the recommended daily intake of vitamin C for adults? Explain or show your reasoning.

At a school, 40% of the sixth-grade students said that hip-hop is their favorite kind of music. If 100 sixth-grade students prefer hip hop music, how many sixth-grade students are at the school? Explain or show your reasoning.

Diego has a skateboard, scooter, bike, and go-cart. He wants to know which vehicle is the fastest. A friend records how far Diego travels on each vehicle in 5 seconds. For each vehicle, Diego travels as fast as he can along a straight, level path.

It takes 10 pounds of potatoes to make 15 pounds of mashed potatoes. At this rate:

1. How many pounds of mashed potatoes can be made with 15 pounds of potatoes?
2. How many pounds of potatoes are needed to make 50 pounds of mashed potatoes?