1. Copyright©Ed2NetLearning.Inc 1 Percents And Decimals

2. Copyright©Ed2NetLearning.Inc 2 Prerequisite Skill Write each fraction as a decimal 1. 9/10-0.9 2. ¾ -0.75 3. 6 4/5-6.8 4. 10 1/8-10.125 5. 10 17/20 -10.85

3. Copyright©Ed2NetLearning.Inc 3 Objective To represent a percent as decimal To represent a decimal as percent

4. Copyright©Ed2NetLearning.Inc 4 Percent as Decimal To write a percent as decimal, rewrite the percent as a fraction with a denominator of 100. then write the fraction as decimal,

5. Copyright©Ed2NetLearning.Inc 5 Write a percent as a decimal Example – 1 Write 3% as a decimal 3 % = 3 100 = 0.03 Rewrite the percent as a fraction with a denominator of 100 Write the fraction as a decimal

6. Copyright©Ed2NetLearning.Inc 6 Example – 2 2. Write 135 % as a decimal 135 % = 135 100 = 1.35

7. Copyright©Ed2NetLearning.Inc 7 Example – 3 3. Write 0.1% as a decimal 0.1 % = 0.1 100 = 0.1 x 10 100 10 = 1 1000 = 0.001 Rewrite the percent as a fraction with denominator 100 Multiply by 10 in the numerator and denominator to eliminate decimal in the numerator. Write the fraction as a decimal

8. Copyright©Ed2NetLearning.Inc 8 Practice Problems Write each percent as a decimal 1. 35 %-0.35 2. 8 %-0.08 3. 125%-1.25 4. 0.01%-0.0001 5. 0.40%-0.004

9. Copyright©Ed2NetLearning.Inc 9 Decimal as a Percent To write a decimal as a percent, write the decimal as a fraction whose denominator is 100. Then write the fraction as a percent

10. Copyright©Ed2NetLearning.Inc 10 Write a Decimal as a Percent Example – 1 Write 0.75 as a percent 0.75=75 100 =75% Write the decimal as a fraction Write the fraction as a percent

11. Copyright©Ed2NetLearning.Inc 11 Example – 2 Write 0.128 as a percent 0.128=128 1000 =128 ÷ 10 1000 ÷ 10 =12.8 100 =12.8 % Write the decimal as a fraction Divide the numerator and the denominator by 10 to get a denominator of 100

12. Copyright©Ed2NetLearning.Inc 12 DO THE PROBLEMS Write each decimal as a percent: 1. 53.8-538% 2. 0.58-58% 3. 0.9-90% 4. 0.09-9 % 5. 0.567-56.7 %

13. Copyright©Ed2NetLearning.Inc 13 Word Problems According to a survey conducted through internet, about 29.1% of the Australians are non – vegetarians. Express the percentage as decimal. 29.1%=0.291

14. Copyright©Ed2NetLearning.Inc 14 Word Problems Mrs. Laura is 0.35 times taller than Mrs. Magnet. What percent is equivalent to 3.5? 0.35=35%

15. Copyright©Ed2NetLearning.Inc 15 Now Your Turn Q. Astle’s batting average for the season 2003 is about 0.321. Write 0.321 as a percent A0.321=32.1 %

16. Copyright©Ed2NetLearning.Inc 16 Review To write a percent as decimal, rewrite the percent as a fraction with a denominator of 100. then write the fraction as decimal, To write a decimal as a percent, write the decimal as a fraction whose denominator is 100. Then write the fraction as a percent

17. Copyright©Ed2NetLearning.Inc 17 Assessment Sheet Write each percent as a decimal 1. 39%-0.39 2. 0.8%-0.008 3. 111%-1.11 4. 310%-3.1 5. 0.07%-0.0007

18. Copyright©Ed2NetLearning.Inc 18 Assessment Sheet Write each decimal as a percent: 6. 0.86-86 % 7. 0.205-20.5 % 8. 1.45-145 % 9. 0.053-5.3 % 10. 33.4-334 %

19. Copyright©Ed2NetLearning.Inc 19 Assessment Sheet 11. How is 72 thousandths written as a percent? 72 thousandths=0.072 0.072=7.2 % 12. The sales tax for a reputed company is 7.85%. Write the percent as a decimal. 7.85 % =0.0785

20. Copyright©Ed2NetLearning.Inc 20 That’s the end Don’t forget to do the Assessment Sheet See You Next Time