Transcript Tuesday, Oct 30 - Xenia Community Schools
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.