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Example for it is:
8 and 12
their gcf is 4
their lcd is 24
how did I get it?gcf, lcd
simple. just think of it as a fraction 8/12
you can use prime factorization
their are two pairs of 2. 2x2=4
so 4 is their gcf
for finding its lcd, you can figure it out by listing method
lcd means lowest common denominator
the only pair you can see is 24.
so 24 is their lcd