21
1/2 = 3/6 1/3 = 2/6 so your common denominator would be 6
1
1 1/2
22/21 = 1 1/21. The common denominator is 21, so 5/7 = 15/21, and 1/3 = 7/21. Add 15/21 + 7/21 = 22/21. Then change to mixed number.
To find the least common denominator of 1/3 and 1/4, we need to determine the smallest multiple that both denominators (3 and 4) have in common. The least common denominator is the least common multiple (LCM) of the denominators. The LCM of 3 and 4 is 12, so the least common denominator of 1/3 and 1/4 is 12.
It is 10/21.
The LCD of 1/3 and 1/9 is 9.
I got 39/56 you have to multiply each fraction by its denominator (4/7 x 8/8 and 1/8 x 7/7) so that way you get a common denominator. then when you multiply them which is (32/56 and 7/56) you add them ultimately getting the answer 39/56. You have to remember that when you add fractions you have to have a common denominator.
To compare 2/7 and 1/5, we need to find a common denominator. The least common multiple of 7 and 5 is 35. Converting 2/7 to have a denominator of 35 gives us 10/35, while converting 1/5 gives us 7/35. Therefore, 2/7 (10/35) is larger than 1/5 (7/35).
You have to find a common denominator, and then add them - watch... 1/2+ 1/3 = common denominator would be 6 3/6+ 2/6=5/6 The answer is 5/6
The best common denominator is 1
Three sevenths plus six sevenths equals nine sevenths. To add fractions with the same denominator, you simply add the numerators together and keep the denominator the same. In this case, 3 + 6 = 9, so the sum is 9/7.