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If the fraction has been simplified then there is no such number.
The denominator in the unsimplified fraction.
In the original fraction it is the denominator but if the fraction has been simplified you are out of luck. There is no way to recover the value of the total (nor the parts) from a simplified fraction.
The denominator.
Take the denominator (bottom # of fraction) and multiply it by the whole number. Then, add that # to the neumorator (top # of fraction) . Put the total number over the original denominator.
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If the fraction has been simplified then there is no such number.
The denominator in the unsimplified fraction.
In the original fraction it is the denominator but if the fraction has been simplified you are out of luck. There is no way to recover the value of the total (nor the parts) from a simplified fraction.
the total number of parts in a fraction
numerator
The bottom number.
There are three parts to a fraction, there is the numerator (the top number), the denominator (the bottom number) and the vinculum (the line in the middle which means 'divide by'-
The denominator.
The denominator.
Mole fraction is dimensionless. It's the amount of moles of species "A" divided by the total amount of moles in the mixture. So "mole A / mole total" equals "dimensionless". To add clarity in the use of mole fractions, one could add as "unit" mole A / mole "mixture".
This is the molar fraction.