Finding the denominator of a fraction

lupus6x9 10 Feb 2009 00:03

Can anyone think of a way of determining the denominator of a fraction? I know that it's easy if the numerator is 1, e.g.

```
// X is the denominator
// F is the fraction/decimal
.5→F
1/F→X
// X = 2, denominator of 1/2
```

But if the numerator is NOT one, then I need to use

```
// X is the denominator
// F is the fraction/decimal
// N is the numerator
.8→F
N/F→X
// X = 5, denominator of 4/5
```

But then I need something else to discover the numerator, so I'm stuck in an endless loop. Does anyone have a solution for this?