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Mathematics 21 Online
OpenStudy (anonymous):

Complex fraction help?

OpenStudy (anonymous):

OpenStudy (jhannybean):

\[\large \frac{\frac{1}{4p}-\frac{3}{p}}{\frac{1}{4p}+\frac{4}{p}}\]

OpenStudy (jhannybean):

First thing we want to do is find a common denominator for both the numerator and denominator. Let's start with the numerator. Between \(4p\) and \(p\), what would you say the common denominator is?

OpenStudy (jhannybean):

@RockerChic8 ?

OpenStudy (anonymous):

i.e using common denominator method separate the numerator and the denominator with a bracket. solve them like you would do your normal fraction addition or subtraction (Remember that, when you are dividing by a fraction, you flip the fraction and turn the division into multiplication.)

OpenStudy (anonymous):

example

OpenStudy (anonymous):

@jhannybean p?

OpenStudy (jhannybean):

Not quite. p is common to both terms, but one is multiplied by 4 and the other is not, therefore out common denominator is \(4p\).

OpenStudy (jhannybean):

Same thing for the denominator. \(4p\).

OpenStudy (jhannybean):

Now we have to multiply both the numerator and denominator of our fractions, \(\dfrac{3}{p}\) and \(\dfrac{4}{p}\) by \(4\).

OpenStudy (jhannybean):

From there, we get: numerator: \(\dfrac{1}{4p} - \dfrac{3\cdot 4}{4p} = \dfrac{1-(3\cdot 4)}{4p}\) denominator: \(\dfrac{1}{4p} +\dfrac{(4\cdot 4)}{4p} = \dfrac{1-(4\cdot 4)}{4p}\) Now simplify both of those.

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