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Quotient Property for Exponents

The Quotient Property for Exponents provides a shortcut for dividing two exponential expressions that share the same base. If aa is a real number, a0a \neq 0, and mm and nn are whole numbers, then:

When m>nm > n: aman=amn\frac{a^m}{a^n} = a^{m-n}

When n>mn > m: aman=1anm\frac{a^m}{a^n} = \frac{1}{a^{n-m}}

In words: to divide powers with the same base, keep the base and subtract the exponents. The property follows from canceling common factors in the numerator and denominator. For instance, x5x2=xxxxxxx\frac{x^5}{x^2} = \frac{x \cdot x \cdot x \cdot x \cdot x}{x \cdot x}. Canceling the two shared factors of xx leaves three factors in the numerator: x3=x52x^3 = x^{5-2}. When the larger exponent is in the denominator, the uncanceled factors remain below the fraction bar: x2x5=1x3=1x52\frac{x^2}{x^5} = \frac{1}{x^3} = \frac{1}{x^{5-2}}. A numerical check confirms the rule: 2522=324=8\frac{2^5}{2^2} = \frac{32}{4} = 8, and 252=23=82^{5-2} = 2^3 = 8 ✓.

This property is the division counterpart to the Product Property for Exponents, which adds exponents when multiplying powers of the same base.

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Updated 2026-05-01

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