# Percentages and per mille

Students can use **percent** and **per mille** in the answers.

The symbol **percent** (%) 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. 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, CalcMe will translate it as

`percent`

and`permille`

.