Oh honey, it's not rocket science. You write 1.4 as "one point four." The "one" represents the whole number, and the "four" represents the tenths place. Just remember to enunciate clearly so nobody thinks you're saying "one point for" instead.
14 tenths =1.4
14.7 or fourteen and seven tenths
14 4/10
1.4
0.5 = five tenths.
Nine tenths.
Eight and five tenths.
Four and five tenths.
4.7 = Four and seven tenths.
It is five tenths.
Seven tenths.
Four tenths.