Subtracting
Subtract two negative fractions that share the denominator :
Subtract the numerators and place the difference over the common denominator:
Simplify by dividing both the numerator and denominator by their greatest common factor, :
Finally, rewrite using the convention that a negative sign in the numerator can be placed in front of the fraction: . This uses the property . The example combines three skills — applying the common-denominator subtraction rule, simplifying the resulting fraction, and correctly positioning the negative sign.
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Elementary Algebra @ OpenStax
Ch.1 Foundations - Elementary Algebra @ OpenStax
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