70
28
The Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions. I assume the 7 and 21 are the denominators of two fractions you need to add or subtract.LCD(7, 21) = 21.
Only 1.
As the denominators are the same (they are all 10), they can be ordered by comparing their numerators: 1 < 3 < 4 < 7 → 1/10 < 3/10 < 4/10 < 7/10 ie the order from least to greatest is: one tenth, three tenths, four tenths, seven tenths.
They are not fractions, so they do not have denominators.
8/9, 5/12, 6/7
The Least Common Multiple (LCM) for 7 14 10 is 70.
The common denominator of any two or more whole numbers will always be 1.
Denominators can only be found in fractions. 105 and 63, therefore, cannot have common denominators. * * * * * 21 and any multiple of 21.
You need at least two denominators to find something in common between them.
In order to solve this, you must first make the denominators equivalent. the lowest common denominator of thes two s ninety. multiply 4/9 ny ten to get 40/90, and multiply 7/10 by nine to get 63/10. you can now see that seven tenths is greater.