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When multiplying fractions, the fractions do not have to have the same denominator as when adding or subtracting. You just multiply the numerators and multiply the denominators, then reduce if necessary.
Example : 3/4 x 5/7 -- multiply 3 times 5 and 4 times 7 = 15/28
Example : 2/3 x 6/7 -- multiply 2 times 6 and 3 times 7 = 12/21
* In this case, you can divide by 3/3 to reduce the fraction to 4/7
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Who invented adding and subtracting fractions?
Me
Why do you have to have a common denominator?
A common denominator is needed when adding or subtracting fractions of different denominators.
Adding and subtracting fractions?
Pulled and mulled
What is a real world situation where it is useful to know about factors and multiples?
When adding or subtracting fractions with different denominators and when reducing fractions to their lowest terms.
What is an LCD in math?
LCD means lowest common denominator which is needed when adding or subtracting fractions that have different denominators.
