Percentage Calculations and Discounts

The video tutorial covers lesson 28 on percents, focusing on understanding percents as parts of 100. It includes examples of calculating distance using rate and time, and solving problems related to discounts and sale prices. The teacher reviews homework, explains how to calculate percentages paid and saved, and sets up new homework problems. The lesson emphasizes the importance of understanding and applying the distance formula and percentage calculations.

What is the formula to calculate distance when given speed and time?

• Distance = Time / Speed

• Distance = Speed x Time

• Distance = Speed / Time

• Distance = Speed + Time

If a shirt originally costs $44 and is on sale for 25% off, what is the sale price?

• $33

• $11

• $22

• $44

How much do you pay for a $20 necklace with a 10% discount?

• $18

• $2

• $22

• $20

If you pay $18 for a necklace after a 10% discount, what was the original price?

• $22

• $20

• $16

• $18

Jane paid $40 for an item after a 20% discount. What was the original price?

• $60

• $40

• $48

• $50

Mr. Yoshi graded 60 out of 75 papers. What percentage of the papers did he grade?

• 90%

• 60%

• 80%

• 75%

If Mrs. Bennett has graded 20% of her 150 students' papers, how many papers has she graded?

• 30

• 20

• 150

• 120

What is the remaining percentage of papers Mrs. Bennett needs to grade if she has completed 20%?

• 50%

• 20%

• 80%

• 60%

If a student teacher graded the remaining papers after Mr. Yoshi graded 60, how many papers did the student teacher grade?

• 30

• 75

• 60

• 15

What is the percentage of papers graded by the student teacher if Mr. Yoshi graded 80%?

• 80%

• 30%

• 20%

• 50%