7.5. Pie Charts http://www.ck12.org
Taco salad: 10%= 10010 = 0. 10
( 300 )( 0. 10 ) =30 people
Spinach salad: 17%= 10017 = 0. 17
( 300 )( 0. 17 ) =51 people
Garden salad: 13%= 10013 = 0. 13
( 300 )( 0. 13 ) =39 people
Chef salad: 25%= 10025 = 0. 25
( 300 )( 0. 25 ) =75 people
- The difference between the number of people who chose the spinach salad and the number of people who chose
the garden salad is 51− 39 =12 people.
Guided Practice
The following pie chart, which is incomplete, shows the extracurricular activities for 200 high school students:
Use the pie chart to answer the following questions:
a. What makes the above pie chart incomplete?
b. How many students participate in sports?
c. How many students participate in drama?
d. How many students do CMT?
e. How many students participate in volunteer activities after school?
f. How many student work?
g. Construct the pie chart so that it shows percentages and not degrees.
Answer:
a. The parts of the pie chart are displayed with degrees, but they should be shown with percentages.
b. The number of students who participate in sports can be calculated as follows:
135
360 =^0.^375 (^0.^375 )(^200 ) =^75
c. The number of students who participate in drama can be calculated as follows:
45
360 =^0.^125 (^0.^125 )(^200 ) =^25
d. The number of students who do CMT can be calculated as follows: