# Multiply fractions: - 5/17 × - 645/9 = ? Multiplication result of the ordinary (simple, common) fractions explained

## The latest fractions multiplied

 - 600/23 × - 750/30 = ? May 09 09:29 UTC (GMT) - 5/17 × - 645/9 = ? May 09 09:29 UTC (GMT) - 40/27 × - 24/45 = ? May 09 09:29 UTC (GMT) 5,700/22 × - 70/26 × 67/14 × - 67/17 × 63/20 × - 10,031/15 = ? May 09 09:29 UTC (GMT) - 22/9 × - 39/11 = ? May 09 09:29 UTC (GMT) 56/32 × - 290/27 = ? May 09 09:29 UTC (GMT) 10/9 × - 5/12 = ? May 09 09:29 UTC (GMT) 2/3 × 282 = ? May 09 09:29 UTC (GMT) - 41/6 × - 22/14 = ? May 09 09:29 UTC (GMT) 12 × 13 × - 8 × 1 = ? May 09 09:29 UTC (GMT) - 24/12 × 15/10 = ? May 09 09:29 UTC (GMT) 13/29 × 16/28 = ? May 09 09:29 UTC (GMT) 48/68 × - 93/103 × - 65/12 = ? May 09 09:29 UTC (GMT) see more... ordinary (common) fractions multiplied by users

## How to multiply two fractions?

#### When we multiply ordinary fractions, the end fraction will have:

• as a numerator, the result of multiplying all the numerators of the fractions,
• as a denominator, the result of multiplying all the denominators of the fractions.
• a/b × c/d = (a × c) / (b × d)
• a, b, c, d are integer numbers;
• if the pairs (a × c) and (b × d) are not coprime (they have common prime factors) the end fraction should be reduced (simplified) to lower terms.

### How to multiply ordinary fractions? Steps.

• Start by reducing fractions to lower terms (simplifying).
• Reduce math fractions to lower terms, online, with explanations.
• Factor the numerators and the denominators of the reduced fractions: break them down to their prime factors.
• Calculate the prime factors of numbers, online calculator
• Above the fraction bar we write the product of all the prime factors of the fractions' numerators, without doing any calculations.
• Below the fraction bar we write the product of all the prime factors of the fractions' denominators, without doing any calculations.
• Cross out all the common prime factors that appear both above and below the fraction bar.
• Multiply the remaining prime factors above the fraction bar - this will be the numerator of the resulted fraction.
• Multiply the remaining prime factors below the fraction bar - this will be the denominator of the resulted fraction.
• There is no need to reduce (simplify) the resulting fraction, since we have already crossed out all the common prime factors.
• If the resulted fraction is an improper one (without considering the sign, the numerator is larger than the denominator), it could be written as a mixed number, consisting of an integer and a proper fraction of the same sign.
• Write improper fractions as mixed numbers, online.
• Multiply ordinary fractions, online, with explanations.