GCSE MATHS REVISION
NOTES
Foundation & higher | exam focused
What You Need to Know
A ratio compares quantities using the same units.
Key Rules
Rule 1: Simplify ratios fully
Rule 2: Total parts matter when sharing
Rule 3: Units must match
Worked Example
A simple worked example illustrating the key concepts.
Question: Divide £20 in ratio 2:3
Solution: Add the parts of the ratio → Total parts = 5
Divide the amount (£20) by 5 → Each part = 4
Times the sides of the Ratio by this number 4 x 2 = £8, 4 x 3 = £12
© Bright Sparks Tutoring – GCSE Maths Revision Notes – Personal Use Only
NOTES
Foundation & higher | exam focused
What You Need to Know
A ratio compares quantities using the same units.
Key Rules
Rule 1: Simplify ratios fully
Rule 2: Total parts matter when sharing
Rule 3: Units must match
Worked Example
A simple worked example illustrating the key concepts.
Question: Divide £20 in ratio 2:3
Solution: Add the parts of the ratio → Total parts = 5
Divide the amount (£20) by 5 → Each part = 4
Times the sides of the Ratio by this number 4 x 2 = £8, 4 x 3 = £12
© Bright Sparks Tutoring – GCSE Maths Revision Notes – Personal Use Only
