04/14/10 Percent Calculations #28

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1 04/14/10 Percent Calculations #28
Warm Up Write each fraction as a percent. Write each percent as a fraction in lowest terms. 4. 20% % % 3 4 1 10 2 5 75% 10% 40% 1 5 1 4 3 5 Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

2 04/14/10 Percent Calculations #28
Correct Homework Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

3 Insert Lesson Title Here
Course 2 6-4 Solving Equations Containing Percents Insert Lesson Title Here 1. 21 is 42% of what number? 2. 73 is what percent of 292? 3. 112% of what number is 84? is what percent of 1340? 5. An ad shows a DVD player on sale for 75% of its original price. If its original price was $242, what is the sale price? 50 25% 75 1% $181.50

4 Fractions, Decimals, and Percents
Course 2 6-1 Fractions, Decimals, and Percents A percent is the ratio of a number to 100. The symbol % is used to indicate that a number is a percent. = 6% 6 100 Reading Math The word percent means “per hundred.” So 6% means “6 out of 100.”

5 04/14/10 Percent Calculations #28
Active Expressions Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

6 Additional Example 1: Modeling Percents
Course 2 6-1 Percents Additional Example 1: Modeling Percents Write the percent modeled by each grid. A B. shaded total _______ 32 100 ___ shaded total _______ 66 100 ___ = 32% = 66%

7 6-1 Percents Check It Out: Example 1
Course 2 6-1 Percents Check It Out: Example 1 Write the percent modeled by each grid. A B. shaded total _______ 44 100 ___ shaded total _______ 75 100 ___ = 44% = 75%

8 04/14/10 Percent Calculations #28
36% Write the percent modeled by the grid. Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

9 04/14/10 Percent Calculations #28
A circle graph, also called a pie chart, shows how a set of data is divided into parts. The entire circle contains 100% of the data. Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

10 04/14/10 Percent Calculations #28
Leon surveyed 30 people about pet ownership. The circle graph shows his results. Use the graph to answer each question. How many people own dogs only? The circle graph shows that 20% of the 30 people own dogs only. 20% of 30 = 0.2 • 30 = 6 6 people own dogs only. Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

11 04/14/10 Percent Calculations #28
Leon surveyed 30 people about whether they own pets. The circle graph shows his results. Use the graph to answer each question. How many people own both cats and dogs? Since 20% is 6 people, 10% is 3 people. 3 people own both cats and dogs. Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

12 04/14/10 Percent Calculations #28
Fifty students were asked which instrument they could play. The circle graph shows the responses. Use the graph to answer each question. flute 10% How many students do not play an instrument? drum 20% The circle graph shows that 50% of 50 students do not play an instrument. 50% of 50 = 0.5 • 50 no instrument 50% = 25 piano 20% 25 students do not play an instrument. Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

13 04/14/10 Percent Calculations #28
Fifty students were asked which instrument they could play. The circle graph shows the responses. Use the graph to answer each question. flute 10% drum 20% Ten students said they play the piano. How many play the flute? Since 20% is 10 students, 10% is 5 students. Five students play the flute. no instrument 50% piano 20% Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

14 04/14/10 Percent Calculations #28
Use the circle graph to answer questions 1-4. 1. Which group of CDs sold the most? 2. What percent of the CD sales are country? 3. Which type of CD sells the least? 41% rock 27% rap 4. If a total of 500 CD’s are sold, how many are Jazz? 55 Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.

15 04/14/10 Percent Calculations #28
Assignment Collect data you can use to make a circle graph. Today’s Plan: -Warm Up & Correct Homework -Percent -Assignment LT: I will calculate percents from a hundreds grid or circle graph.