8:05 Multiplying Fractions Using Cancellation | Math with Mr. J
Clear step-by-step guide to cancelling common factors before multiplying fractions, with several worked examples.
Pre-cancelling in fraction multiplication
Simplify fraction multiplication by pre-cancelling
4 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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4 shown 8:05 
2:23 Multiplying Fractions: Cancelling and Cross-Cancelling
Directly on topic: why pre-cancelling makes fraction multiplication easier, with clear examples.
3:37 Multiplying Fractions Using Cancellation
Short, popular demonstration of cancelling fractions before multiplying to get the answer in simplest form.
5:42 Math Antics - Multiplying Fractions
Highly polished intro to multiplying fractions that includes simplifying before multiplying.