13.
-0.8=-0.8/1=-8/10=-4/5
14.
0.44=0.44/1=44/100=22/50=11/25
15.
-1.35=-1.35/1=-135/100=-27/20
16.
0.888888888=8/9 (if somethiing repeats, it's probably over 9 or 11 or something)
17.
-1.555555=-5/9-1=-5/9-9/9=-14/9
18.
4.4555555555=4.4+0.055555555=44/10+5/90=396/90+5/90=401/90