non (ontheqt) wrote in thequestionclub,
non
ontheqt
thequestionclub

anyone know how to find lowest common denominator?

my teacher said it if the number is 15

15=3x5
10=2x5

and the lcd would be 2x3x5.
but he also said that if there are two or more of the same number, you would use that twice.
but the example I have up there disagrees with that statement.

any help would be great.
thanks.
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