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ALG.2.2

Rearrange formulae - all variables in the denominator

Change the subject of a formula involving fractions where all the variables are in the denominators

5 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.

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Grade 6–8 Stretch 🇬🇧 UK

GCSE Maths - Rearranging Formulas Part 2 - When The Subject Appears Twice (2026/27 exams)

Cognito 197K views

Harder rearranging where the subject appears twice, clearing fractions and factorising to isolate it.

Jump to 0:00Intro: Changing the subject when it appears multiple times 0:46Example 1: Making x the subject (Step 1)1:41Step 2: Collect Subject Terms 3:30Step 3: Factorise Subject Terms 3:55Step 4: Isolate the Subject 4:33Example 2: Making b the subject

Grade 6–9 Stretch 🇬🇧 UK

Changing the Subject - Harder Formulae (Higher Only) | GCSE Maths Tutor

The GCSE Maths Tutor 187K views

Higher-only strategies for the hardest rearranging, including fractions and subjects in denominators.

Grade 6–8 Stretch 🇬🇧 UK

Rearranging Harder Formulae

Maths Genie 172K views

Harder formulae rearranging including making the subject that sits in the denominator.

Grade 4–8 Core 🇺🇸 US

How To Change The Subject of a Formula - GCSE Maths

The Organic Chemistry Tutor 648K views

Thorough, patient run through many change-of-subject cases including variables trapped in denominators.

Grade 4–7 Core 🇬🇧 UK

Rearranging Equations - GCSE Physics

Physics Online 50K views

Corbettmaths' trusted, clear introduction to changing the subject of a formula.