Calculating Percentages and Ratios

This video tutorial covers the use of proportions to solve percent problems. It begins with an introduction to the concept, followed by practical examples such as calculating the number of flowers needed for arrangements, determining shot percentages in basketball, and expanding a room's dimensions. The lesson also includes a section on using nutrition labels to find daily intake values. Throughout, the video emphasizes the connection between proportional reasoning and percent calculations.

What is the main focus of this lesson?

• Solving algebraic equations

• Learning about fractions

• Connecting percent and proportion

• Understanding geometry

In the flower arrangement problem, what is the ratio of purple to white flowers?

• 4:1

• 3:1

• 2:1

• 1:1

How many total flowers are needed for 30 arrangements?

• 180

• 90

• 120

• 150

If the florist buys flowers in groups, how many red flowers are needed?

• 25

• 10

• 15

• 20

What percentage of shots did Emily make in the basketball example?

• 75%

• 80%

• 50%

• 60%

How does Camilla's shooting percentage compare to Emily's?

• Twice as much as Emily's

• More than Emily's

• Less than Emily's

• Same as Emily's

What is the save percentage of the hockey goalie?

• 85%

• 90%

• 92.5%

• 95%

What will be the new length of Megan's room after expansion?

• 8 meters

• 7 meters

• 6 meters

• 5 meters

How many milligrams of calcium should be consumed daily?

• 1300 mg

• 1200 mg

• 1000 mg

• 1500 mg

What is the new width of Megan's room after expansion?

• 3.5 meters

• 4 meters

• 4.5 meters

• 5 meters