I would like the **correct: 1/3** But fractions have to be typed a certain way. How can I have the fraction be the correct answer?

There are a variety of ways to check, each with their own pros and cons. (Samples are assuming an input, and would vary slightly if using a table.)

- Latex matching is not recommended, though itâ€™s much more stable than it used to be. If youâ€™re not sure the way latex should be typed, put it in the calculator and copy/paste it into your CL. It will auto-format it. The following will only accept the fraction as written. Pro: itâ€™s not too complicated to write. Con: for things like expressions, all variations would need to be defined

```
correct: this.latex = `\frac{1}{3}`
```

- Evaluation. Non-terminating decimals can be an issue, so using a tolerance may be needed. This would accept any equivalent, not just the explicit â€ś1/3â€ť. Pro and con: any equivalent is accepted

```
correct: this.numericValue = numericValue(`\frac{1}{3}`)
```

```
or with a tolerance
```

```
correct: numericValue(`\abs(${this.latex}-\frac{1}{3})`) <= 0.01
```

- Pattern matching can be used alone or along with evaluation. The following pattern is specifically for â€ś1/3â€ť, but could be a generic fraction pattern by removing
`.satisfies( )`

and then using evaluation as well. Pro: there is soooo much you can do with patterns to allow or restrict different forms. Cons: not the lowest entry point to learn

```
p = patterns
correct: p.fraction(p.integer.satisfies(`x=1`), p.integer.satisfies(`x=3`) ).matches(this.latex)
```

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Pattern matching sounds interesting. I have yet to play around with it. Any good example activities that I can view that you have stored around?

Jay Chow has an article here with some resources to start with. Definitely need to play with it a bit to get the hang of it, and thereâ€™s some nuance to how a few of them work.

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