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Fraction Multiplication

To multiply two fractions, multiply their numerators together and multiply their denominators together. For any numbers aa, bb, cc, and dd with b0b \neq 0 and d0d \neq 0:

abcd=acbd\frac{a}{b} \cdot \frac{c}{d} = \frac{ac}{bd}

Unlike addition and subtraction, fraction multiplication does not require a common denominator. After multiplying, the resulting fraction should be simplified by canceling any common factors shared by the numerator and denominator. For example, 5x6310=5x3610=15x60\frac{5x}{6} \cdot \frac{3}{10} = \frac{5x \cdot 3}{6 \cdot 10} = \frac{15x}{60}. Factoring reveals that 55 and 33 are common to both numerator and denominator, so the fraction simplifies to x4\frac{x}{4}.

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Updated 2026-05-02

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