For example, for 9/5 + 14/7, the multiples of 5 are 5, 10, 15, 20, 25, 30, and 35 while the multiples of 7 are 7, 14, 21, 28, and 35. 35 is the least common multiple.
For example, multiply 9/5 by 7 to get a denominator of 35. You should also multiply the numerator by 7, so the fraction becomes 63/35.
For example, if you’ve adjusted 9/5 to 63/35, multiply 14/7 by 5 to get 70/35. Your original problem 9/5 + 14/7 will turn into 63/35 + 70/35.
For example, 63 + 70 = 133. Place it over the denominator to get 133/35.
For example, 133/35 can be simplified to 3 28/35. The fraction can be reduced to 4/5 so the finished answer is 3 4/5.
For example, 6 3/8 + 9 1/24 will turn into 51/8 + 217/24.
Because the multiples of 8 include 8, 16, 24, 32, and 48 and the multiples of 24 include 24, 48, and 72, 24 is the lowest common multiple.
For example, to make the denominator for 51/8 become 24, multiply the whole fraction by 3. You should get 153/24.
For example, if you’re working with 217/24, you won’t need to adjust the fraction since it already has the same denominator.
For example, 153/24 +217/24 = 370/24.
For example, 370/24 will become 15 10/24 because 24 goes into 370 15 times and has 10 parts of 24 left over. 10/24 can be further reduced to 5/12 for a finished answer of 15 5/12.
