Calculating Percentages and Sales Prices

The video tutorial covers lesson 15, focusing on percentage calculations and decimal operations. Students are instructed on homework, class schedules, and upcoming tests. Various strategies for calculating percentages, including the ten percent and one percent strategy, are demonstrated. The tutorial also includes practical applications like calculating sale prices.

What materials are required for today's lesson?

• Math book, pencil, and scrap paper

• Math book, pen, and calculator

• Math book, pencil, and calculator

• Math book, pen, and ruler

What is the result of multiplying 23 by 100?

• 0.23

• 23

• 230

• 2300

What is the result of 50 divided by 100?

• 0.5

• 5

• 50

• 0.05

How can you calculate 30% of 250 using a tape diagram?

• Multiply 250 by 3

• Divide 250 by 5 and multiply by 3

• Divide 250 by 10 and multiply by 3

• Multiply 250 by 0.3

What percentage of people attended both the drama play and the music concert if 175 out of 250 attended both?

• 50%

• 80%

• 60%

• 70%

What is the ten percent and one percent strategy used for?

• Calculating the average of a set of numbers

• Finding any percent of a number

• Finding the sum of two numbers

• Dividing a number by 100

If a t-shirt's regular price is $10, what is its sale price at 80% of the regular price?

• $8

• $10

• $12

• $2

What is the sale price of an item originally priced at $4, if the sale is 80% of the original price?

• $2.80

• $3.00

• $4.00

• $3.20

Which expression can be used to find 80% of a number x?

• 80x

• 0.8x

• 8x

• 0.08x

How do you find 49% of a number?

• Multiply by 0.49

• Multiply by 49

• Divide by 0.49

• Divide by 49