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Percent of a Number

Using percents to solve real-world problems

What is a percent?

1. Percent just means part of 100.
2. Percent is a ratio that compares a number to 100.
3. Percent can be expressed as a decimal and as a fraction.

Multiple Choice

What does the word percent mean?

• part out of 10

• part out of 100

• part out of 1

• part out of 1000

Finding Percents of a Number:Method One

Multiple Choice

25% is what fraction in simplest form?

• 1/2

• 1/4

• 1/3

• 1/5

Multiple Choice

50% is what fraction in simplest form?

• 1/4

• 1/2

• 1

• 1/5

Finding Percents of a Number Method Two

1.Write the percent as a decimal by moving the decimal two places to the left in the percent

(35% ----> 0.35)

2 Multiply the quantity times the decimal

(0.35 x 80 = 28)

Multiple Choice

Convert 20% to a decimal.

• .20

• 20

• .002

• 200

Multiple Choice

Convert 31% to a decimal.

• 3.1
• 0.031
• 0.31
• 310

Finding Percents of a Number

Remember you can use method one (top example) or method two (bottom example) to find the percent of a number.

Use the guided notes in the Google classroom to help you solve the problems on the next five slides.

Multiple Choice

Mrs. Patrick bought a package of 15 expo markers. 20% of them were blue the others were black. How many expo markers were blue?

• 3

• 5

• 7

• 9

Multiple Choice

What is 75% of 92?

• 6.9

• .69

• 69

• 690

Multiple Choice

There is a jar of jellybeans on Mr. Schidrich's desk. 40% of the jellybeans are red. If there are 55 jelly beans in the jar, how many are red??

• 20

• 22

• 24

• 25

Multiple Choice

The Middletown Zoo has 130 different exhibits. Of those 130 exhibits, 30% of them contain birds. How many exhibits contain birds?

• 49

• 39

• 60

• 25

Multiple Choice

What is 9% of 50?

• 4.5

• 45

• .45

• .045

Multiple Choice

Calculate 25% of 80

• 20
• 80
• 48
• 95

Multiple Choice

What is 15% of 82?

• 12.3
• 123
• 1.23

Multiple Choice

What is 30% of 50?

• 16
• 16.3
• 17.4
• 15

Multiple Choice

What is 90% of 250?

• 245
• 225
• 255
• 244.33

Multiple Choice

What is 20% of 65?

• 13
• 15
• 16
• 13.75

Multiple Choice

What is 42% of 65?

• 23.7
• 25.3
• 27.3

Multiple Choice

What is 23% of 65?

• 14.95

• 15.95

• 16

• 13.75

Multiple Choice

What is 98% of 254?

• 247.93
• 248.92
• 248.99
• 244.33

Multiple Choice

What is 3% of 750?

• 2.25
• 22.5
• 225

Multiple Choice

9% of 50

• 4.5
• 45
• .45
• .045

Multiple Choice

4% of 53

• 21.2
• 2.12
• 212
• .212

Multiple Choice

28% of 4

• 11.2
• 112
• 1.12
• .112

Multiple Choice

43% of 14

• 60.2
• 6.02
• .602
• 602

Multiple Choice

75% of 92

• 6.9
• .69
• 69
• 690

Multiple Choice

21% of 34

• .714
• 71.4
• 714
• 7.14

Multiple Choice

If 100% = $200, how much is 20%?

• $100

• $20

• $40

• $10

Multiple Choice

There is a jar of jellybeans on Mr. Schidrich's desk. 40% of the jellybeans are red. If there are 55 jelly beans in the jar, how many are red??

• 20

• 22

• 24

• 25

Multiple Choice

The middletown Zoo has 130 different exhibits.  Of those 130 exhibits, 30% of them contain birds.  How many exhibits contain birds?

• 49
• 39
• 60
• 25

Multiple Choice

In the school election James ran against Ben for secretary.  James received 75% of the votes.  If 240 students voted, how many votes did James receive?

• 175
• 160
• 153
• 180

Multiple Choice

How do you find the percent of a number?

• Multiply the percent by the number.
• Change the percent to a decimal, and then multiply by the number.
• Change the number to a percent, and then multiply by the fraction.