1. 7
Percent

2. R.1 Fractions
7.1 The Basics of Percent
Objectives
Learn the meaning of percent.
Write percents as decimals.
Write decimals as percents.
Write percents as fractions.
Write fractions as percents.
Use 100% and 50%.

3. Learn the meaning of percent.
Sec

4. Learn the meaning of percent.
Example
Write a percent to describe each situation.
You left a $15 tip when the bill was $100.
$15 per $100 or 15/100 or 15%.
(b) You pay $7 in tax on a $100 CD player.
$7 per $100 or 7/100 or 7%.
You earn 89 points on a 100-point math test.
89 points out of 100 or 89/100 or 89%.

5. Write percents as decimals.

6. Write percents as decimals.
Write each percent as a decimal.
47%
47% = 47 ÷ 100 = 0.47 3%
3% = 3 ÷ 100 = 0.03
28.2%
28.2% = 28.2 ÷ 100 = 0.282
(d) 100%
100% = 100 ÷ 100 = 1.00
135%
135% = 135 ÷ 100 = 1.35
Example

7. Write percents as decimals.
Write each percent as a decimal by dropping the percent symbol and moving the decimal point two places to the left.
17%
17% = 17.% = 0.17
160%
160% = 160.% = 1.60
4.9%
4.9% = 04.9% = 0.049
Example

8. Write decimals as percents.

9. Write decimals as percents.
Write each decimal as a percent.
0.21
0.21 = 21%
0.59
0.59 = 59%
1.92
1.92 = 192%
2.5
2.5 = 2.50 = 250%
Example
Percent symbol is attached.
Decimal point not written.

10. Write percents as fractions.

11. Write percents as fractions.
Write 25% as a fraction in lowest terms.
Example
Drop the % symbol and write 25 over 100.

12. Write percents as fractions.
Write each percent as a fraction or mixed number in lowest terms.
76%
150%
Example

13. Write percents as fractions.
Example
Write each percent as a fraction in lowest terms.
15.5% .

14. Write fractions as percents.

15. Write fractions as percents.
Write as a percent.
Example
Check.

16. Write fractions as percents.
Write as a percent.
Example

17. Write fractions as percents.
Write as a percent.
Example

18. Use 100% and 50%.
(a) What is 100% of $42?
100% is all of the money.
So 100% of $42 is $42.
(b) What is 100% of 9 miles?
100% is all of the miles.
So 100% of 9 miles is 9 miles.
Example

19. Use 100% and 50%.
(a) What is 50% of $42?
50% is half of the money.
So 50% of $42 is $21.
(b) What is 50% of 9 miles?
50% is half of the miles.
So 50% of 9 miles is 4.5 miles.
Example