copyright©amberpasillas2010 Changing Fractions To Percents and Changing Decimals to Percents For today’s lesson get a calculator! TAKE OUT A CALCULATOR
copyright©amberpasillas2010 Percent means “ per hundred.” 100 of
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).
copyright©amberpasillas2010 The letter C in Roman Numerals stands for 100 or “ cent ”. CCC means 300.
copyright©amberpasillas2010 We use percents with money. The dollar is in hundredths. If you understand money then learning percents will be easy!
copyright©amberpasillas2010 $.50 is ½ of a dollar 50% also means ½ 50¢ = $1.00
copyright©amberpasillas % = == Decimal Fraction Simplified Percent
copyright©amberpasillas % = 50 parts out of 100 or 50 hundredths
copyright©amberpasillas % = 10 parts out of 100 or 10 hundredths
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%
0.4 = 0.40 What percent is green? 40% green
copyright©amberpasillas2010 What percent is green? 0.4 = 0.40 You do NOT need the zero!
copyright©amberpasillas2010 Name The Percent 42%33%75%
copyright©amberpasillas2010 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of 100. Per-cent means per 100
copyright©amberpasillas2010 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of 100.
copyright©amberpasillas2010 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of 100.
copyright©amberpasillas2010 To Change a Decimal to a Percent : Multiply the decimal by = 85% * Multiplying by 100 results in moving the decimal 2 places to the right.
copyright©amberpasillas2010 Change The Decimals To Percents DECIMALS ANSWER DECIMALS ANSWER 1) 0.502) 0.3 3) 0.824) ) 1.566) % 30% 82% 11.5% 156% 0.1%
copyright©amberpasillas2010 To Change a Fraction to a Percent 2 5 5)5) 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 = 40% copyright©amberpasillas2010
Change The Fractions To Percents FRACTIONS ANSWER FRACTIONS ANSWER 12.5% 66.6% 30% 250% 40% 1) 3) 5) 2) 6) 4) 75%
copyright©amberpasillas2010 REMEMBER: To Always Show Your Work Take out your study guide!!!
copyright©amberpasillas2010 #9 To change a Fraction to a Percent: Set up an equivalent fraction using a denominator of % 60% Per-cent means per 100