Understanding Bar Graphs and Percentages

The video tutorial explains how to analyze survey data using a bar graph, calculate the total number of survey participants, and determine the percentage of respondents with a specific number of children. It demonstrates converting fractions to percentages and solving problems using percent proportions, providing two methods for calculating percentages.

What does the horizontal axis of the bar graph represent?

• The percentage of adults

• The frequency of responses

• The number of children

• The number of adults

How many adults reported having zero children?

• Six

• Two

• Five

• Three

What is the total number of adults who participated in the survey?

• 15

• 19

• 21

• 25

What fraction of adults reported having five children?

• 2/19

• 3/19

• 1/19

• 4/19

How do you convert a fraction to a percentage?

• Add 50

• Multiply by 100

• Multiply by 10

• Divide by 100

What is the percentage of adults who have five children?

• 8.5%

• 5.5%

• 12.5%

• 10.5%

In a percent proportion, what is the number 100 used for?

• To find the median

• To calculate the average

• To compare the percentage

• To represent the total number of adults

What is the result of cross-multiplying in the percent proportion method?

• 19 * P = 50

• 19 * P = 150

• 19 * P = 100

• 19 * P = 200

Which method is NOT mentioned as a way to solve the percentage problem?

• Using a bar graph

• Using a calculator

• Using a percent equation

• Using a percent proportion

What is the approximate decimal equivalent of 2/19?

• 0.125

• 0.115

• 0.105

• 0.095