November 17, 2010

1. November 17, 2010 • Write your homework in your agenda: • Open your agenda to your behavior card.

2. Conversions Being able to use fractions, decimals and percents interchangeably

3. Rational numbers (decimals, fractions, and percents) What am I Learning Today? How will I show that I learned it? To understand and use rational numbers to convert between fractions, decimals, and percents.

4. What exactly is a percent? • You can remember that percentmeans “per hundred.” For example, 8% means “8 per hundred,” or “8 out of 100.” • Most states charge sales tax on items you purchase. Sales tax is a percent of the item’s price. A percent is a ratio of a number to 100.

5. 2 5 40% .40

6. 2 5 40% .40

7. Questions Answers How do I change from a percent to a decimal? - Move the decimal point two places to the left. - Drop the percent sign. *This is the same as dividing by 100.

8. Change the percent to a decimal. 19 % = .19 4 % = .04 17 % = .17

9. 2 5 40% .40

10. Questions Answers How do I change from a decimal to a percent? - Replace the % with a decimal - Move the decimal point two places to the right - Attach a percent sign *This is the same as multiplying by 100.

11. Flip Book Decimal to Percent Move your decimal 2 places to the right and add a % sign EX: 0.67 =

12. Change the decimal to a percent. .5 = 50% .02 = 2 % 130 % 1.3 =

13. 2 5 40% .40

14. Questions Answers How do I change from a percent to a decimal? - Move the decimal point two places to the left. - Drop the percent sign. *This is the same as dividing by 100.

15. Flip Book Percent to Decimal Drop the %, move the decimal 2 places to the left. EX: 65% =

16. Change the percent to a decimal. 19 % = .19 4 % = .04 17 % = .17

17. 2 5 40% .40

18. Questions Answers How do I change from a decimal to a fraction? - Write it as you would read it - The number itself is the numerator - The denominator is the place value - SIMPLIFY

19. Flip Book Decimals to Fractions Write the number as the numerator over its place value & simplify EX: 0.45 =

20. Change the decimal to a fraction: 43 .43 = 100 1 .01 = 100

21. 2 5 40% .40

22. Questions Answers How do I change from a fraction to a decimal? - Divide the denominator into the numerator. - Try to divide out to the thousandths place to see if it’s a terminating or repeating decimal

23. Flip Book Fractions to Decimals Divide the denominator into the numerator EX: 2/5 =

24. Change the fraction to a decimal: 4 = 0.8 5 7 0.875 = 8

25. 2 5 40% .40

26. Questions Answers How do I change from a percent to a fraction? - Put the number over 100 and reduce - Drop the percent sign. *Remember, “percent” means “per hundred”

27. Flip Book Percents to Fractions Write the number over 100 & simplify EX: 96% =

28. Change the percent to a fraction: 32 16 8 32 % = = = 100 50 25 7 35 = 35% = 20 100

29. 2 5 40% .40

30. Questions Answers How do I change from a fraction to a percent? - Convert fraction to a decimal number by dividing the numerator by the denominator - Move the decimal point two places to the right. - Attach a percent sign.

31. Flip Book Fractions to Percents Change the fraction to a decimal, then to a percent by moving the decimal 2 places to the right EX: 1/2 =

32. Change the fraction to a percent: 3 = 15 ) 3 = 0.2 = 20% 15 5 = 8 ) 5 = 0.625 = 62.5% 8

33. 7 1. .23 23 2. 70% 10 100 Convert to a fraction: Convert to a percent: 3. 4. 1 .23 23% 0.2 = 20% 5 Convert to a decimal: 5. 6. 1 70% 0.7 0.2 5