0 votes

Best answer

Here's how to subtract fractions:

1. Make sure the fractions have the same denominator (bottom number):

If the fractions already have the same denominator, you can skip this step.

If the denominators are different, you need to find a common denominator. This is the least common multiple (LCM) of the two denominators.

Here's how to find the common denominator:

- List out the multiples of each denominator until you find a number that appears in both lists.
- The smallest number that appears in both lists is the common denominator.

2. Once you have the common denominator, adjust the fractions to have it:

- Multiply the numerator and denominator of the first fraction by the number needed to get the second denominator as the common denominator.
- Do the same for the second fraction, multiplying by the number needed to get the first denominator as the common denominator.

3. Subtract the numerators (top numbers):

- Keep the common denominator the same.
- Subtract the numerator of the second fraction from the numerator of the first fraction.

4. Simplify the answer (optional):

- Check if the numerator and denominator have a common divisor (a number that divides both the numerator and denominator without leaving a remainder).
- If they do, divide both the numerator and denominator by the greatest common divisor (GCD) to simplify the fraction.