Calculating Percentages and Discounts

The video tutorial covers solving percent problems, focusing on finding 10% of a number by moving the decimal point left. It uses models like tape diagrams, fractions, and double number lines to illustrate the concept. The tutorial also explores the effect of multiple discounts on prices, demonstrating that separate discounts result in a higher final price than a single combined discount.

What is the main claim about finding 10% of a number?

• Multiply the number by 10.

• Move the decimal point one place to the left.

• Add 10 to the number.

• Subtract 10 from the number.

Which model can be used to find 10% of a number?

• Bar graph

• Pie chart

• Tape diagram

• Histogram

If 10% of 80 is calculated using fractions, what is the result?

• 12

• 8

• 10

• 16

What is the result of finding 10% of 64 using a double number line?

• 640

• 0.64

• 64

• 6.4

What mistake was corrected when finding 10% of 48?

• Using 48 as the whole instead of the part

• Using 48 as the part instead of the whole

• Multiplying instead of dividing

• Adding instead of subtracting

What percent of a book did Gary read if he read 34 pages out of 340?

• 20%

• 15%

• 10%

• 5%

What is the claim about taking multiple discounts off a price?

• It has no effect on the final price.

• It is the same as taking the sum of the discounts off the original price.

• It results in a higher final price.

• It results in a lower final price.

What was the original price of the games if Sam paid $140 after a 30% discount?

• $400

• $300

• $200

• $100

If a 20% discount is followed by a 10% discount, what is the final price of a $200 item?

• $140

• $180

• $144

• $160

What conclusion can be drawn about taking two separate discounts?

• It results in a higher price than taking the sum of the discounts at once.

• It is the same as taking the sum of the discounts at once.

• It results in a lower price than taking the sum of the discounts at once.

• It has no effect on the final price.