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| FINDING
THE LOWEST COMMON DENOMINATOR (LCD) |
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Once you have the prime factorization
of each, start with all the prime factors of the first number, in this
example the number 6.
So, the LCD = 2 • 3 • ?
Now look at all the prime factors of the second number, in this example
the number 9. Ask yourself, “Are all the prime factors of 9 represented
in the LCD?” Answer, “No!” The number 9 has two prime
factors of 3 but only one factor of 3 is represented.
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