Answer:
When adding fractions with different denominators, you need to find the LCD (Least Common Denominator).
Step-by-step explanation:
For example:
2/3 + 4/5
To find the LCD we need to find a table that has the same number in both five and three which is 15.
3,6,9,12,15
5,10,15
___
So now multiply 2/3 by 5 and 4/5 by 3.
Now the problem is..
10/15 + 12/15
Then just add the numerators across! (Keep the denominators the same).
When you add them you get 22/15. So since the answer is improper we need to divide it into a mixed number. The answer is 1 7/15.
Hope this helped! :D
Answer:
You add fractions with a different factor by using a common factor for the denominator.
Step-by-step explanation:
Example:
4/5 + 3/4=
4: 4,8,12,16,20
5: 5,10,15,20
The factor I'm using is 20, but you can use whichever is comfortable for you.
4 x 4=16
5 x 4=20= 16/20
Use the same formula for 3/4, then add. Make sure both fractions have the same denominator.
15/20 + 16/20= 31/20 or 1 and 11/20.
