5 Minute Check

Find the following.

1. What is .15 written as a percent?

2. What is 0.399 written as a percent?

3. What is 7 written as a percent?

5 4. What is 575% written as a mixed number?

5. What is 22.5% written as a fraction in simplest form?

6. What is 6 written as a decimal?

4

5 Minute Check

Find the following.

1. What is .15 written as a percent?

5 Minute Check

Find the following.

1. What is .15 written as a percent?

.15 x 100 = 15%

5 Minute Check

Find the following.

2. What is 0.399 written as a percent?

5 Minute Check

Find the following.

2. What is 0.399 written as a percent?

.399 x 100 = 39.9%

5 Minute Check

Find the following.

3. What is 7 written as a percent?

5

5 Minute Check

Find the following.

3. What is 7 written as a percent?

5 1 7 = 5 36 5 36 ÷ 5 = 7.2

7.2 x 100 = 720%

5 Minute Check

Find the following.

4. What is 575% written as a mixed number?

5 Minute Check

Find the following.

4. What is 575% written as a mixed number?

575 ÷ 100 = 5.75

5.75 = 5 75 100 5 = 5 100 3 4

5 Minute Check

Find the following.

5. What is 22.5% written as a fraction in simplest form?

5 Minute Check

Find the following.

5. What is 22.5% written as a fraction in simplest form?

22.5 ÷ 100 = .225

.225 = = 1000 9 40

5 Minute Check

Find the following.

1 6. What is 6 written as a decimal?

4

5 Minute Check

Find the following.

1 6. What is 6 written as a decimal?

4 1 6 = 4 25 4 25 ÷ 4 = 6.25

Tuesday, Oct 1

Lesson 2.7

Percent of a Number

Percent of a Number Objective: To find the percent of a number.

Percent of a Number

Percent of a Number

At the end of this lesson you should be able to answer the following questions.

How do you find the percent of a number?

a number. Percent of a Number There are two methods to find the percent of

Percent of a Number Find 40% of 80. Method 1 Step 1 – Set up a proportion.

=

Percent of a Number Find 40% of 80. Method 1 Step 2 – Simplify. 40 = 80 =

Percent of a Number Find 40% of 80. Method 1 Step 3 – Cross Multiply. = 2 x 80 = 160 ÷ 5 = 32

Percent of a Number Find 60% of 90. (Do this on your own)

Percent of a Number Find 60% of 90. (Do this on your own) 60 = = 90 3 x 90 = 270 ÷ 5 = 54

Percent of a Number Suppose there are 300 students at Central Middle School. Find the number of students that have cheese as a snack. Method 2 Step 1 – Convert the percent to a decimal.

15% = .15

Percent of a Number Suppose there are 300 students at Central Middle School. Find the number of students that have cheese as a snack. Method 2 Step 2 – Multiply the Decimal by the number.

.15 x 300 = 45

Percent of a Number Suppose there are 300 students at Central Middle School. Find the number of students that have cheese as a snack. Find the number of students that have chips as a snack. (Do this on your own)

Percent of a Number Suppose there are 300 students at Central Middle School. Find the number of students that have cheese as a snack. Find the number of students that have chips as a snack. 18% = .18

.18 x 300 = 54

Percent of a Number Find 145% of 320. (Do this on your own)

Percent of a Number Find 145% of 320. 145% = 1.45

1.45 x 320 = 464 Since the procedure to convert a percent to a decimal involves removing the percent sign, the answer should have no percent sign.

Percent of a Number Find 145% of 320 Calculator Shortcut – “145”, press “2 nd ”, press “%”, then “320”, then press “enter”. (You may want to write this down)

Percent of a Number Find 220% of 65. (Do this on your own)

Percent of a Number Find 220% of 65. 220% = 2.2

2.2 x 65 = 143

Percent of a Number Find .25% of 58. (Do this on your own)

Percent of a Number Find .25% of 58. .25% = .0025

.0025 x 58 = .145

Percent of a Number Find 128% of 550. (Do this on your own)

Percent of a Number Find 128% of 550. 128% = 1.28

1.28 x 550 = 704

Percent of a Number Find .3 % of 200. (Do this on your own)

Percent of a Number Find .3 % of 200. .3% = .003

.003 x 200 = .6

Percent of a Number In a recent state Special Olympics meet, Franklin County sent a team of 70 players. Twenty percent of the team competed in soccer. How many athletes competed in soccer? (Do this on your own)

Percent of a Number In a recent state Special Olympics meet, Franklin County sent a team of 70 players. Twenty percent of the team competed in soccer. How many athletes competed in soccer? 20% = .20

.2 x 70 = 14

Percent of a Number In this same meet 15% of the team from Delaware County competed in tennis. If there were 20 members on the team, how many played tennis?

(Do this on your own)

Percent of a Number In this same meet 15% of the team from Delaware County competed in tennis. If there were 20 members on the team, how many played tennis?

15% = .15

.15 x 20 = 3

Percent of a Number Complete the Guided Practice on page 150 Agenda Notes Homework – Homework Practice 2-7 Due Wednesday, Oct 2 Chapter 2 Test - Friday, Oct 4 Due to conferences, no help session this chapter.