thirty
30 = 2 x 15 = 3 x 10 = 5 x 6 = 6 x 5
furthermore, of 2 3 5 6 the 2 and 3 are not needed,
as 6 is already 2 x 3 so only 5 and 6 are in question.
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lcd(2, 6, 12) = 12.
2/3 and 3/4Looks like 12 here, so use form of one to convert both fractions to LCD form.4*2/4*3 and 3*3/3*48/12 and 9/12==========
5 factors into 1 and 5 6 factors into 2 and 3 Therefore, the least common multiple is 1*2*3*5 = 30 This is what you would use for the LCD, convert the fifths and sixths into thirtieths.
1/6 is one fraction. You need at least two fractions to find something in common.
2/12=1/6 The LCD of 1/6 and 3/4=The LCD of 1/6 and 1/4=12 Therefore, 2/12 and 9/12 have the same denominator. They are equal to the original fractions. LCD=12