Arithmetic/Multiplying Fractions

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Multiplying fractions[edit]

To multiply two fractions:

  • multiply the numerators to get the new numerator, and
  • multiply the denominators to get the new denominator.

For instance,

.

Dividing fractions[edit]

To divide one fraction by another one, flip numerator and denominator of the second one, and then multiply the two fractions. The flipped-over fraction is called the multiplicative inverse or reciprocal.

For instance,

.

To simplify a compound fraction, like , just remember that a fraction is the same as division, and divide (3/5) ÷ (1/4), which comes to 12/5.