- Use rationals if accuracy is your main concern. For example, operations on decimals are not associative.

```
(let [a 1.0e50
b -1.0e50
c 17.0e00]
(= (+ (+ a b) c) (+ a (+ b c)))) ; => false
```

From the above example, one can infer that decimals are subjected to Floating Point corruption. You can find more examples here.

- Rationals are slower in terms of operations on them when compared to decimals. There is an overhead involved when doing operations on rationals.