1. Do Now 3/31/11 Take out HW from last night. Take out HW from last night. Text p. 337, #10-22 even, & #26 Text p. 337, #10-22 even, & #26 Copy HW in your planner. Copy HW in your planner. Text p. 342, #14-60 evens Text p. 342, #14-60 evens Mid-Chapter 7 Quiz (Sections 7.1-7.4) Tuesday Mid-Chapter 7 Quiz (Sections 7.1-7.4) Tuesday In your journal, convert the following fractions into decimals. In your journal, convert the following fractions into decimals. 1/85/4 2/9 3½ 0.125 1.250.23.5

2. Homework Text p. 337, #10-22 even, & #26 10) 78.4% 10) 78.4% 12) 39 12) 39 14) 64 14) 64 16) 280 grams 16) 280 grams 18) 40% 18) 40% 20) a). 30 cars 20) a). 30 cars b). 53 1/3% c). 12 cars 22) a). 50%, 12 ½% b). 81 8 th graders c). About 234 students 26) 1

3. Objective SWBAT use decimals to solve percent problems SWBAT use decimals to solve percent problems

4. Percent- means ‘per one hundred’ or divided by 100. How many cents are there in a dollar?

5. Section 7.3 “Percents and Decimals a ratio whose denominator is 15 0.1515% 100 O O 15 15100 15 O O 1 == Percent DecimalsPercents Fractions Fractions ==

6. Always move the decimal point TWO places to the RIGHT and add a % sign! Always move the decimal point TWO places to the RIGHT and add a % sign! % 0.71 71 Writing Decimals as Percents When you move the decimal point two places to the RIGHT, you are really multiplying by 100. %.0

7. Replace the % sign with a decimal and always move the decimal point TWO places to the LEFT! Replace the % sign with a decimal and always move the decimal point TWO places to the LEFT! % 71%71 Writing Percents as Decimals When you move the decimal point two places to the LEFT, you are really dividing by 100. %.0

8. 0.1212% 0.245 24.5% 24.5% 0.17 17% 17% 0.03 3% 3% Writing Decimals as Percents Writing Percents as Decimals

9. 2200% 0.0045 0.45% 0.45% 1.7 170% 170% 0.003 0.3% 0.3% Writing Decimals as Percents Writing Percents as Decimals

10. Writing Fractions as Percents Write the fraction as a decimal and percent. This means 1 divided by 8. A fraction is the quotient of two integers of two integers Remember 18 0 8 2 12 Finished.00 16 4 0 5 40 0.125 = 12.5%

11. Writing Fractions as Percents Rewrite the fraction as a decimal. This means 7 divided by 8. A fraction is the quotient of two integers of two integers Remember 78 0 64 6 87 Finished.00 56 4 0 5 40 0.875 = 87.5%

12. Writing Fractions as Percents Rewrite the fraction as a decimal. This means 5 divided by 12. A fraction is the quotient of two integers of two integers Remember 512 0 48 2 41 Repeating decimal.00 12 8 0 6 72 0.416 = 41.6% 8

13. Finding Percent of a Number “OF” means multiplication 10.5% 0.105 0.105 Find 10.5% of 5600. 3.8% 0.038 0.038 Find 3.8% of 45. 120% 1.2 1.2 Find 120% of 400.

14. Homework Text p. 342, #14-60 evens Text p. 342, #14-60 evens