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Ratio Basics

Revise Ratio Basics in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears less often, but it can still pick up marks when it appears in mixed-topic papers.

Study this topic

1

The Art of Sharing

Introduction2

Understanding Ratios

Key Facts3

Key Ratio Concepts

Key Facts4

Method: Sharing in a Given Ratio

Deep Dive5

Method: Finding Missing Values

Deep Dive6

Visual Understanding

Diagram7

Worked Example 1: Simplifying Ratios

Notes8

Worked Example 2: Sharing Amount

Notes9

Worked Example 3: Three-Way Ratio

Notes10

Worked Example 4: Finding Missing Value

Notes11

Worked Example 5: Converting Units

Notes12

Advanced: Ratio Problems

Deep Dive13

Common Mistakes to Avoid

Exam Tips14

Exam Tips

Exam Tips

Sample Flashcards

Order in Ratios
Order MATTERS! Boys:Girls = 3:5 means: • 3 boys for every 5 girls Girls:Boys = 5:3 means: • 5 girls for every 3 boys Different meanings!
What is a ratio?
A comparison of quantities of the same kind Written as a:b or a/b Example: 3:5 means '3 parts to 5 parts'

Sample Questions

Write the ratio 12:18 in its simplest form.

  • A. 6:9
  • B. 4:6
  • C. 2:3
  • D. 3:2
1 markfoundation

Explain the difference between the ratio 3:5 and the ratio 5:3.

2 marksstandard

12

exam-style questions

22

revision flashcards

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Proportion