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Simplifying a Fraction

A fraction is in simplified form (also called lowest terms) when the numerator and the denominator share no common factor other than 11. To reduce a fraction to simplified form, identify the largest number that divides both the numerator and the denominator evenly — their greatest common factor (GCF) — and divide each by that number. For example, 1015\frac{10}{15} simplifies to 23\frac{2}{3} because the GCF of 1010 and 1515 is 55, and dividing both by 55 gives 10÷515÷5=23\frac{10 \div 5}{15 \div 5} = \frac{2}{3}. If the GCF is 11, the fraction is already in simplest form and no further reduction is needed.

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Updated 2026-05-02

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