Percentage Calculations and Discounts

This video tutorial covers Math 6 Unit 3 Lesson 14 on solving percentage problems. It begins with an introduction to mental math with decimals and progresses to solving percentage problems using various methods, including mental math and table diagrams. The lesson includes practical examples involving coupons and concludes with a summary and homework solutions.

What is the mental math approach to finding 80% of 12?

• Divide 12 by 0.8

• Subtract 8 from 12

• Multiply 12 by 0.8

• Add 8 to 12

Han uses a 10% off coupon on a $15 item. How much does he save?

• $3.00

• $1.50

• $2.00

• $1.00

Claire saves $6 on a $24 item. What percentage discount did she receive?

• 10%

• 20%

• 30%

• 25%

What is the percentage of a pot filled when it contains 9 L of water, given the pot's capacity is 36 L?

• 10%

• 75%

• 50%

• 25%

160 is what percent of 40?

• 200%

• 300%

• 400%

• 500%

If May saves $13 on a 20% off sale, what was the original price of the item?

• $52

• $85

• $65

• $78

A scarf originally costs $16, and a shopper saves $12. What is the discount percentage?

• 75%

• 60%

• 50%

• 70%

Which expression has a value greater than 100?

• 1% of 1000

• 120% of 100

• 50% of 150

• 200% of 30

An ant travels 30 cm in 2 minutes. What is its speed per minute?

• 15 cm/min

• 25 cm/min

• 10 cm/min

• 20 cm/min

Is 3.5 cups more or less than one liter?

• Equal

• More

• Cannot be determined

• Less