Histograms

Histograms

Finding the percents

Review - To find the percent from the part of a histogram

• Find the number of classrooms with 25 or less 12 + 8 + 2 = 22

• Find the total number of classrooms 2 + 8 + 12 + 3 = 25

• Write a fraction comparing the two numbers: 22/25

• Divide to turn the fraction into a decimal: 0.88

• Muliply by 100 to make the decimal a percent: 0.88 x 100 = 88%

Use the next graph the answer questions 1-3

Multiple Choice

1.What is the total number of students represented in the graph?

• 8

• 20

• 39

Multiple Choice

2.What fraction of students had 0-9 cougar cash?

• 9/20

• 9/39

• 4/20

• 4/9

Fill in the Blanks

3.What percent of students had 0-9 dollars in cougar cash?

Use the next graph to answer questions 4-6

Multiple Choice

How many months was the temperature 30 degrees or higher?  

• 7

• 69

• 12

• 2

Multiple Choice

What fraction of months was the temperature 30 degrees or higher?

• 7/12

• 30/69

• 2/30

• 2/9

Fill in the Blanks

What percent of months were the temperature 30 degrees or higher? (round to the nearest tenth)

Use the graph on the next slide to answer questions 7-9

Fill in the Blanks

What percent of students scored between 81-100? (round to the nearest tenth)

Fill in the Blanks

What percent of students scored 40 or less?

Fill in the Blanks

What percent of students scored 41 or higher?

Use the next graph to asnwer questions 10-12

Fill in the Blanks

What percent of the frequency have less than 30?

Fill in the Blanks

What percent of the frequency are between 20-25?

Fill in the Blanks

What percent of the frequency are between 21 and 35?