Exploring Percent Increase and Decrease with Tape Diagrams

What is the purpose of using tape diagrams in percent problems?

• To confuse the students

• To avoid using calculators

• To make the problems more complex

• To visually represent the problems

If Tom had 8 trophies last year and won 25% more this year, how many trophies does he have now?

• 10

• 8

• 12

• 6

What does the first rectangle in a tape diagram represent?

• The total amount

• The original amount

• The decreased amount

• The increased amount

How do you calculate 25% of 8 using a calculator?

• 0.25 - 8

• 0.25 * 8

• 0.25 / 8

• 0.25 + 8

What is the total number of trophies Tom has after the increase?

• 8

• 11

• 9

• 10

If Jenna had 20 cookies and ate 20% of them, how many cookies does she have left?

• 18

• 16

• 14

• 12

What does the original rectangle represent in a percent decrease problem?

• The increased amount

• The decreased amount

• The original amount

• The total amount

How do you calculate 20% of 20 using a calculator?

• 0.2 + 20

• 0.2 / 20

• 0.2 * 20

• 0.2 - 20

What is the remaining percentage of cookies after Jenna eats 20% of them?

• 70%

• 80%

• 90%

• 60%

How many cookies does Jenna have left after eating 20% of them?

• 12

• 14

• 16

• 18