Exploring Percent Calculations and Applications

The video tutorial covers three methods for solving percentage problems: double number line, tape diagram, and percent proportion. Each method is explained with examples, demonstrating how to calculate percentages of given numbers and how to find unknown totals or percentages. The tutorial emphasizes visual and proportional reasoning to enhance understanding.

How do you find 10% of a number using a double number line?

• None of the above

• Divide the total by 10

• Multiply the total by 0.1

• Add 10% to the total

What is 10% of 110?

• 10

• 1

• 11

• 110

How do you calculate 30% of 110 using the double number line method?

• Divide 100% by 3

• None of the above

• Multiply 10% by 3

• Add 10% three times

What is 25% of 60 using a tape diagram?

• 60

• 25

• 15

• 30

In a tape diagram for percentages, what does each group represent if the total is divided into five groups?

• 20%

• 5%

• 25%

• 10%

Using a tape diagram, how would you calculate 40% of 120?

• None of the above

• Divide into 5 groups and multiply two groups

• Divide into 4 groups and sum them

• Divide into 10 groups and sum four of them

Using percent proportion, how do you find the part if 60% of 110 is known?

• None of the above

• Divide 110 by 60

• Use a ratio of 60 to 100

• Multiply 110 by 0.6

What does a 60% ratio of 110 translate to in actual value?

• 66

• 100

• 60

• 110

If 12 is 25% of a number, what is the total number?

• 48

• 50

• 45

• 40

What percentage is 45 out of 150?

• 30%

• 25%

• 50%

• 45%