# Multiply fractions: 28/12 × 91/20 = ? Multiplication result of the ordinary (simple, common) fractions explained

## The latest fractions multiplied

 28/12 × 91/20 = ? Jan 19 14:25 UTC (GMT) 6/64 × 8/15 = ? Jan 19 14:25 UTC (GMT) 19/42 × - 22/41 = ? Jan 19 14:25 UTC (GMT) - 49/33 × - 24/52 = ? Jan 19 14:25 UTC (GMT) 3/10 × 7/10 = ? Jan 19 14:25 UTC (GMT) - 7/24 × 59/11 × - 2,381/14 × 6,417/11 × 51/9 × - 55/10 × 58/8 × 339/13 = ? Jan 19 14:25 UTC (GMT) 24/33 × 45/24 = ? Jan 19 14:24 UTC (GMT) 35/64 × - 36/80 = ? Jan 19 14:24 UTC (GMT) - 27/82 × 47/75 = ? Jan 19 14:24 UTC (GMT) - 21/43 × 26/35 = ? Jan 19 14:24 UTC (GMT) 16 × 1/8 = ? Jan 19 14:24 UTC (GMT) 3/5 × 300 = ? Jan 19 14:24 UTC (GMT) - 14/27 × 85/19 = ? Jan 19 14:24 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.