28/36 Divide by the GCD (greatest common denominator) 28/4=7 36/4=9 Final answer=7/9
The lowest common denominator is 1/4 x 1/9 = 1/36. 1/4 = 36/4x1 x 1/36 = 9/36 7/9 = 36/9x7 x 1/36 = 28/36 28/36 - 9/36 = 21/36 = 7/12
To subtract fractions with different denominators, first find a common denominator. In this case, the least common multiple of 9 and 4 is 36. Convert both fractions to have a denominator of 36, then subtract the numerators. 7/9 becomes 28/36 and 3/4 becomes 27/36. Therefore, 7/9 - 3/4 is equal to 28/36 - 27/36, which simplifies to 1/36.
63 ... 3, 7, 9, 21, 63 36 ... 2, 3, 4, 6, 9, 12, 18, 36 common factors ... 3, 9
To give a number in its simplest form, you need to identify any common divisors between the denominator and numerator. In this case, both 36 and 28 divide by 4. If we do this, we get 9/7. 9 and 7 have no common factors, and so 36/28 in its simplest form is 9/7.
28 = 36 x 7/9 = 36/9 x 7 = 4 x 7
Factors of 7: 1, 7Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36GCF (7, 36) = 1
The common factors of 9 and 36 are 1, 3, and 9.
The LCD is 36
36
The common factors of 9 and 36 are: 1, 3, and 9
The Least Common Multiple (LCM) for 12 2 9 is 36.