How can we use the concept:
We can use circle graphs to analyze data. Circle graphs can use fractions, percentages, or actual values of the given data.
Sample Math Problems
1. The circle graph shows the percent of each type of flower a nursery sells. What percent of flowers are not biennials?
Answer:
To solve, find the sum of the percent of flowers that are not biennials.
52% + 20% = 72%
72% of the flowers are not biennials.
2. An ice cream store recorded its weekly sales for the different flavors of ice cream it sells using a circle graph. What percentage of sales is chocolate chip?
Answer: The sum of all percents in a pie chart is 100%. Find the sum of the given percentages and subtract it from 100% to find the percentage of chocolate chip.
10% + 23% + 12% + 8% + 19% = 72%
100% - 72% = 28%
28% of sales is chocolate chip.
3. The circle graph shows the results of a survey of 96 students who were asked what their favorite hobby was. How many students chose stamp collecting?
Answer:
The circle graph shows a fraction of the total number of students surveyed. To solve, find ⅜ of 96.
⅜ x 96 = 36
36 students chose stamp collecting as their favorite hobby.
4. To celebrate his son’s birthday, Mr. Smith ordered 100 balloons to decorate the party hall. The circle graph represents each color balloon as a fraction of the total balloons.
Part A: What is the fraction of orange balloons?
Part B: How many orange balloons were there?
Answer:
For Part A, the sum of the fractions is 1. Find the sum of the given fractions, and subtract it from 1.
