1. Bell Work: What is the length of the hypotenuse? C 4 8

2. Answer: √80

3. Lesson 48: Percent of a Whole

4. Percents are commonly used to describe the part of a whole.
Shanna answered 92% of the questions correctly.
A basketball player has made 80% of her free throws.
The governor was elected with 56% of the vote.

5. In this lesson we will use a three- row ratio table to help us solve percent problems about parts of a whole.

6. A percent is a ratio, with the given percent representing the part and 100% representing the total.

7. Example: Thirty percent of the students ride the bus
Example: Thirty percent of the students ride the bus. If 210 do not ride the bus, how many students are there in all?

8. Answer: 70/100 = 210/t 300 students in all
Percent
Count 30 a
(70)
210
100 t

9. Example: Shanna correctly answered 17 of the 20 questions on the game show. What percent of the questions did she answer correctly?

10. Answer: c/100 = 17/20 She answered 85% correctly
Percent
Count c 17 n 3
100 20

11. Practice: Mariah has read 135 of the 180 pages in the book
Practice: Mariah has read 135 of the 180 pages in the book. What percent of the book has she read?

12. Answer: r/100 = 135/180 75% of the book.
Percent
Count r
135 n 45
100
180

13. Practice: The Springfield Sluggers won 64% of their games and lost 9 games. How many games did the Sluggers win?

14. Answer: 64/w = 36/9 16 games
Percent
Count 64 w 36 9
100 t

15. HW: Lesson 48 #1-30