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Weds, Nov. 16, 2011

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thuy
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Bellwork : In a national study, 32 out of 100 students said they are bullied at school. Write this as a fraction Find the GCF of 32 and 100 Use the GCF to write as a fraction in simplest form. Weds, Nov. 16, 2011. 5.3. Notes & Practice Problems:

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  1. Bellwork: In a national study, 32 out of 100 students said they are bullied at school. Write this as a fraction Find the GCF of 32 and 100 Use the GCF to write as a fraction in simplest form Weds, Nov. 16, 2011 5.3 Notes & Practice Problems: Converting between Fractions, Decimals & Percents 5.4 Homework: HW Slip – 6 problems

  2. Essential Question: How are fractions, decimals and percents related to each other? 5.3

  3. Fraction Equivalent Representations of Same Value Decimal Percent

  4. Review: Fractions & Decimals • A fraction can be written as a decimal bydividing the numerator by the denominator. • “Put the top in the box” and divide. • Ex: is the same as “3 divided by 8” • and 0.375 are equivalent (they have the same value) 0.375 3.000 -24 60 - 56 40 - 40 0 8 5.3

  5. Repeating & terminating decimals • Decimals whose digits end are called terminating decimals. • Ex: 0.375 • Decimals that have a pattern in their digits that repeats forever are called repeating decimals. • Ex: When we write as a decimal, the three repeats indefinitely. • We use bar notation to show that a number pattern repeats indefinitely. • Ex: 0.333… is written as 0. and 0.121212… is written as 0. 0.333… 1.000 - 9 10 - 9 10 - 9 1 3 5.3

  6. Quick Check 1) has the same value as which decimal? a) 0.60 b) 0.20 c) 0.80 d) 0.75 2) has the same value as which decimal? a) 0.b) 0.30 c) 0.90 d) 0. 3) Which of the following is a terminating decimal? a) 0. b) 0.30 c) 0. d) 0.

  7. Fractions & percents A percent is a ratio that compares a number to 100. 57 out of 100 57% 12 out of 25 48% 5.3

  8. Quick Check 1) 48 out of 100 is what percent? a) 5% b) 0.48% c) 4.8% d) 48% 2) 32 out of 50 is what percent? a) 32% b) 64% c) 0.32% d) 0.64%

  9. Decimals & percents A decimal can be written as a percent by writing the number of hundredths followed by a percent sign (%). 0.62 62 hundredths 62% 0.05 5 hundredths 5% 0.375 37.5 hundredths 37.5% 5.3 Hundredths place

  10. Quick Check 1) 0.73 has the same value as… a) 7.3% b) 0.73% c) 73% 2) 3.4 has the same value as… a) 340% b) 34% c) 3.4%

  11. Fractions & percents A percent can easily be written as a fraction. 84% 7% 250% 5.3

  12. Quick Check 1) 46% has the same value as which fraction? a) b) c) d)

  13. Percents & decimals A percent can be written as a fraction with a denominator of 100. This shows the number of hundredths. 37% 37 hundredths 0.37 9% 9 hundredths 0.09 5.3

  14. Quick Check 1) 27% has the same value as… a) 0.27 b) 2.70 c) 27 2) 300% has the same value as… a) 0.30 b) 3.00 c) 0.03

  15. homework 5.4 Write as a decimal. Write the resulting decimal as a percent. Write 40% as a fraction in simplest form. Write 2.75 as a percent. Write 0.087 as a percent. Write as a percent.