Copyright © 2000 by Monica Yuskaitis Revised by Frankie Welch 2012

 Percent can be defined as “of one hundred.” Copyright © 2000 by Monica Yuskaitis 100 of

 “Cent” comes from the Latin and means 100. Copyright © 2000 by Monica Yuskaitis Many words have come from the root cent such as century, centimeter, centipede, & cent.

 The letter C in Roman Numerals stands for 100 or “cent”. Copyright © 2000 by Monica Yuskaitis CCC means three hundred.

 We write our change from a dollar in hundredths. Copyright © 2000 by Monica Yuskaitis If you understand money, learning percents is a breeze.

 $.50 is ½ of a dollar  50% also means ½ Copyright © 2000 by Monica Yuskaitis 50¢ = $1.00

 50% means ½  50% of 6 stars is 3 stars Copyright © 2000 by Monica Yuskaitis = 50% of

Copyright © 2000 by Monica Yuskaitis 50% = == DecimalFraction Simplified Percent

Copyright © 2000 by Monica Yuskaitis 50 parts out of 100 or 50 hundredths

 $.10 is 1/10 of a dollar  10% also means 1/10 Copyright © 2000 by Monica Yuskaitis = $ ¢

 10% means 1/10  10% of 10 ice creams is 1 ice cream Copyright © 2000 by Monica Yuskaitis = 10% of

Copyright © 2000 by Monica Yuskaitis 10% = == DecimalFraction Simplified Percent

Copyright © 2000 by Monica Yuskaitis 10 parts out of 100 or 10 hundredths

.50 = 50% = 50/100 = ½ . 25 = .10 = .75 = .05 =  Now let’s see why..

 40% = 40 =  35% = ___ = ___ Do these: 24% 79% 98% Can you do this one? 103% Write a few for your seat neighbor and exchange. To go from percent to fractions, all you do is put the percent over 100! Then simplify.

 Method One  Multiply denominator by whatever it takes to get to 100. (equivalent fractions)  Do the same to the numerator.  4 x 20 = 80 = 80% 5 x Do this one: 1 x _____ = _____ = _____% 4 x 100

 Method Two  Divide the denominator into the numerator to turn it into a decimal.  4 5 __ 0. 8___ fractions to perrrcents 5 l 4. 0 move decimal two times to the rrrright! _____ = 80%

 75% =.75  38% =.38  Do this one: 67% = ______ To change from percent to decimalllll just move the decimal two times to the lllleft. You can also divide the percent by 100.

Fractions Decimals Percents  1/5 =.20 = 20% Copyright © 2000 by Monica Yuskaitis