6. Multiplication and Division of Fractions
Recall the following fraction facts:
When multiplying by a fraction, multiply numerators and multiply denominators:
If you can, simplify first :
(I canceled the `13` & `39` to give `1/3` and the `12` with the `24` to give `1/2`.)
When dividing by a fraction, invert and multiply:
(I multiplied by the inverse of `2/7`, which is `7/2`.)
When we do the same things with algebraic expressions, remember to SIMPLIFY FIRST, so that the problem is easy to perform.
Simplifying first, we cancel the 11 in the first fraction with the 33 on the bottom of the second fraction:
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