Answer: 7/15
Explanation:
2/3 - 1/5
Find the LEAST COMMON DENOMINATOR for 3 and 5. (These are the bottom numbers of your fractions!)
The least common denominator for 3 and 5 is 15.
Look at it this way.
Multiply 3 by 1, 2, 3, 4, 5:
3, 6, 9, 12, 15
Multiply 5 by 1, 2, 3:
5, 10, 15
Both of them match at 15! This is your least common denominator.
Now, let's go back.
2/3 - 1/5
Since you want 15 on the bottom, multiply 2/3 by 5/5.
2 x 5 = 10
3 x 5 = 15
Now we have: 10/15
We also want 15 on the bottom of 1/5. Multiply by 3/3.
1 x 3 = 3
5 x 3 = 15
Now we have: 3/15
Finally, you can solve the problem!
10/15 - 3/15 = ?
Your answer is: 7/15.