# Percentages and per mille

Students can use **per cent** and **per mille** in the answers. Thus, decimal answers will be understood as mathematically equal to the corresponding percentage or per mille.

## Example

Consider the following question:

To make percentages and per miles a valid notation, we need to enable the **per cent** symbol within the *Input options > Input syntax* section.

On the other hand, the symbol **per cent** (%) must be typed with the keyboard, while the symbol **per mille** (‰) has a button in the answer toolbar. If you expect the students to answer per mille, you must provide the MathType toolbar.

### Note

Alternatively, you can provide that symbol in the question wording for them to copy & paste. They can also use the combo ALT+0137 (numeric keypad).

These symbols are similar to physical units:

You can do basic arithmetic with them and also

`convert()`

them.You can make an algorithm with these symbols, and CalcMe will translate it as

`percent`

and`permille`

.