DECIMALAND PERCENT CONVERSIONS

By: Quinton HendersonAnd

Richard Pope

Definition

Percent can be defined as “of one hundred.”

100of

50 % Means50 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

LET’S WORK SMART AND NOT HARD!

HINT: WHEN CONVERTING PERCENT TO DECIMALS, TAKE THE PERCENT SIGN (%) OFF AND REPLACE IT WITH A DECIMAL. ONCE THE DECIMAL IS IN PLACE, MOVE THE DECIMAL 2 PLACES TO THE LEFT.

SO 50% BECOMES 0.50 OR 0.5

LET’S PRACTICE

CONVERT THE FOLLOWING PERCENTS INTO DECIMALS

16%

55%

720%

ANSWERS!!!!

16% = 0.16= 16 or 4

100 25

55% = 0.55= 55 or 11 100 20

720% = 7.20 or 7.2 = 720 or 7 1 100 5

LET’S TAKE A SHORT CUT!

Hint: When converting decimals to percent, move the decimal 2 places to the right. Once the decimal is in place, place the percent sign (%) at the end of the number.

Examples:

0.72 becomes 72%

0.257 becomes 25.7%

PRACTICE TIME!!

Convert the following decimals to percent.

0.52

0.9

0.135

LET’S SEE HOW WELL YOUR DID!

0.52 = 52% = 52 = 13 100 25

0.9 = 90% = 90 = 9 100 10

0.175 = 17.5% = 175 = 7 1000 40

LET’S PRACTICE!

How would eighteen thousandths be written as a percent?

About 95% of all fish species have skeletons made of bone. Express 95% as a decimal.

How would ten and four tenths percent be expressed as a decimal?

GET, READY, SET, GO!

ANSWERS!!!!!

DECIMAL PERCENT 0.018 1.8%PERCENT DECIMAL 95% 0.95PERCENT DECIMAL 10.4% 0.104

REFLECTIONS

How are percents, decimals and fractions similar? How are they different? List your reasons and let us discuss them.