This deep dive covers Reading and Interpreting Pie Charts within Pie Charts for GCSE Mathematics. Revise Pie Charts in Statistics for GCSE Mathematics with 14 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 5 of 7 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 5 of 7
Practice
14 questions
Recall
20 flashcards
Reading and Interpreting Pie Charts
Finding Values from Angles
Formula: Value = (Angle ÷ 360°) × Total
Example: Reading a Pie Chart
A pie chart shows how 240 people travel to work. The "Car" sector has an angle of 150°. How many people travel by car?
Solution:
Value = (150° ÷ 360°) × 240 = (5/12) × 240 = 100 people
Comparing Sectors
- Largest sector: Represents the modal category
- Equal sectors: Have the same frequency
- Sector comparisons: Can be made using angles or percentages
Converting to Percentages
Formula: Percentage = (Value ÷ Total) × 100%
Or: Percentage = (Angle ÷ 360°) × 100%