How do you make a division sign on a keyboard?

I typed Alt-246. Press and preserve the Alt key whilst you type 2 four 6 on the numeric keypad, no longer the numbers across the top of the keyboard. You need to have Num-lock on.

 

I use this most often to insert the degree symbol, that's Alt-248: °

 

Another beneficial one is Alt-241, that's the plus or minus symbol: ±

 

These are prolonged ASCII codes. They work on a PC. There is some thing similar on a Mac, however I don't know what it is. You should appearance it up at the internet.