To multiply fractions, you multiply the numerators and the denominators. NO COMMON DENOMINATOR is required.
To divide fractions, you multiply the numerator by the reciprocal of the divisor.
When multiplying, look for factors to cancel before actually multiplying the numerators and denominators. This will eliminate the need to reduce the end result.
Sometimes mixed numbers are confused with multiplication. Be sure to remember that 4 2/3 does not imply multiplication, it represents addition.
If fractions have a common denominator, simply add or subtract the values found in the numerator and write the result over the common denominator and reduce if necessary.
Add or subtract.
Step 1: Determine the least common multiple of the denominators (LCD).
Step 2: Multiply numerator and denominator by what you need to obtain equivalent fractions with that LCD.
Step 3: Add the numerators and write the result over the common denominator.
Step 4: Reduce if necessary.
Division Word Problem: A board that is 5 1/4 feet long is cut into 7 pieces of equal length. What is the length of each piece?