1. copyright©amberpasillas2010 Changing Fractions To Percents and Changing Decimals to Percents For today’s lesson get a calculator! TAKE OUT A CALCULATOR

2. copyright©amberpasillas2010 Percent means “ per hundred.” 100 of

3. copyright©amberpasillas2010 “ Cent ” comes from Latin and means 100. Many words have come from the root word cent such as centimeter (100 cm), century (100 years), & centipede (100 legs).

4. copyright©amberpasillas2010 The letter C in Roman Numerals stands for 100 or “ cent ”. CCC means 300.

5. copyright©amberpasillas2010 We use percents with money. The dollar is in hundredths. If you understand money then learning percents will be easy!

6. copyright©amberpasillas2010 $.50 is ½ of a dollar 50% also means ½ 50¢ = $1.00

7. copyright©amberpasillas2010 20%.20 20 100 1515 = == Decimal Fraction Simplified Percent

8. copyright©amberpasillas2010 50% = 50 parts out of 100 or 50 hundredths. 12345678910 11121314151617181920 21222324252627282930 31323334353637383940 41424344454647484950 51525354555657585960 61626364656667686970 71727374757677787980 81828384858687888990 919293949596979899 100

9. copyright©amberpasillas2010 10% = 10 parts out of 100 or 10 hundredths. 12345678910 11121314151617181920 21222324252627282930 31323334353637383940 41424344454647484950 51525354555657585960 61626364656667686970 71727374757677787980 81828384858687888990 919293949596979899 100

10. copyright©amberpasillas2010 How many hundredths are red ? How many hundredths are yellow ? Say it as a DECIMAL and then as a PERCENT! 32 hundredths = 0.32 WHICH EQUAL 32% 68 hundredths = 0.68 WHICH EQUALS 68% Notice that 32% + 68% = 100%

11. 0.4 = 0.40 What percent is green? 40% green

12. copyright©amberpasillas2010 What percent is green? 0.4 = 0.40 You do NOT need the zero!

13. copyright©amberpasillas2010 Name The Percent 42%33%75%

14. copyright©amberpasillas2010 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of 100. Per-cent means per 100

15. copyright©amberpasillas2010 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of 100.

16. copyright©amberpasillas2010 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of 100.

17. copyright©amberpasillas2010 To Change a Decimal to a Percent : Multiply the decimal by 100. 0.85 100 = 85% * Multiplying by 100 results in moving the decimal 2 places to the right.

18. copyright©amberpasillas2010 Change The Decimals To Percents DECIMALS ANSWER DECIMALS ANSWER 1) 0.502) 0.3 3) 0.824) 0.115 5) 1.566) 0.001 50% 30% 82% 11.5% 156% 0.1%

19. copyright©amberpasillas2010 To Change a Fraction to a Percent 2 5 5)5) 2.00.4 20 00 0 00 0 Change it to a decimal first. Divide the numerator by the denominator Change your decimal to a percent. Multiply your decimal by 100. This is the same as moving the decimal 2 places to the right. 0.40 = 40% copyright©amberpasillas2010

20. Change The Fractions To Percents FRACTIONS ANSWER FRACTIONS ANSWER 12.5% 66.6% 30% 250% 40% 1) 3) 5) 2) 6) 4) 75%

21. copyright©amberpasillas2010 REMEMBER: To Always Show Your Work Take out your study guide!!!

22. copyright©amberpasillas2010 #9 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of 100. 25% 60% Per-cent means per 100