Percent Percent

Content Standards

Mathematics and Numeracy

G1.S1.c3-6 d5

DefinitionDefinition Percent can be defined as “of one hundred.”

100of

20 % Means20 % Means20 parts out of 100 or 20 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

Percents Have Equivalents in Percents Have Equivalents in Decimals and FractionsDecimals and Fractions

20% .2020100

15= = =

Decimal FractionFraction

SimplifiedPercent

How to Find the Percent of How to Find the Percent of a Whole Numbera Whole Number

The first thing to remember is “of” means multiply in mathematics.

of = x

How to Find the Percent of How to Find the Percent of a Whole Numbera Whole Number

Step 1 - When you see a percent problem you know when you read “of” in the problem you multiply.

25% of 200x

How to Find the Percent of a How to Find the Percent of a Whole NumberWhole Number

Step 2 – Change your percent to a decimal and then move it two places to the left.

25% x 200..

How to Find the Percent of a How to Find the Percent of a Whole NumberWhole Number

Step 3 – Multiply just like a regular decimal multiplication problem.

200x .251000

+4005000

How to Find the Percent of a How to Find the Percent of a Whole NumberWhole Number

Step 4 – Place the decimal point 2 places to the left in your answer.

200x .251000

+4005000.

What is the percent of this number?What is the percent of this number?

820x .20

000+1640

16400.

20 % of 820.. x

What is the percent of this number?What is the percent of this number?

725x .40

000+2900

29000.

40 % of 725.. x21

What is the percent of this number?What is the percent of this number?

692x .60

000+4152

21520.

60 % of 692.. x15