Copyright © 2000 by Monica Yuskaitis Revised by Frankie Welch 2012
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Copyright © 2000 by Monica Yuskaitis Revised by Frankie Welch 2012
Percent can be defined as “of one hundred.”
Copyright © 2000 by Monica Yuskaitis
100of
“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 threehundred.
We write our change from a dollar in hundredths.
Copyright © 2000 by Monica Yuskaitis
If you understandmoney, learning percents is a breeze.
$ .50 is ½ of a dollar 50% also means ½
Copyright © 2000 by Monica Yuskaitis
50¢
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% .5050100
12= = =
Decimal FractionFraction
SimplifiedPercent
Copyright © 2000 by Monica Yuskaitis
50 parts out of 100 or 50 hundredths.1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
$ .10 is 1/10 of a dollar 10% also means 1/10
Copyright © 2000 by Monica Yuskaitis
=$1.00
10¢
10¢
10¢
10¢
10¢
10¢
10¢
10¢
10¢
10¢
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% .1010100
110= = =
Decimal FractionFraction
SimplifiedPercent
Copyright © 2000 by Monica Yuskaitis
10 parts out of 100 or 10 hundredths.1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
.50 = 50% = 50/100 = ½ . 25 = .10 = .75 = .05 =
Now let’s see why..
40% = 40 = 2 100 5
35% = ___ = ___
35 7
100 20
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 20 100
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 - 4 0 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.
FractionsDecimalsPercents
1/5 = .20 = 20%
Copyright © 2000 by Monica Yuskaitis
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