Technically she is 117 years old she mentioned in one of Link's memories that she was turning 17 the next day. Then she sealed Ganon for 100 years making her 117 years old at the end of the game.
There is still that 17 figure. I guess I'll leave the artwork here as it is.
Ah but like I said at the end of the game she is over 100 years old.
Deviantart. 