1. Math 5-1: Ratios & Percents
Objective: How to write ratios as percents and vice versa.

2. Vocabulary percent – a ratio that compares a number to 100
ratio – comparison of two numbers by division

3. Write Ratios as Percents
James made 65 out of 100 free throws.
65 out of 100 = 65%
¼ of all high school students are not taking physics.
equivalent fraction → ¼=25/100
so, 25 out of 100 = 25%

4. Write Ratios as Percents
According to the 2000 U.S. Census, 13 out of every 100 people living in Delaware were 65 or older.
About 4 out of 5 commuters in the United States drive or carpool to work.

5. Write Ratios as Percents
In 2000, about 3/200 of the population in Peru used the Internet.
In 2001, Manny Ramierz got on base 40.5 times for every 100 times he was at bat.

6. Write Percents as Ratios
write as a fraction with a denominator of 100
simplify

7. Write Percents as Ratios
21%
10%
120%
.05%

8. Assignment
Pg. 208 (14-42e)
5-1 E (ec)
Family Activity – Due 11/19