There are two ways to write it: 1 4/10 or 1.4.
1.4
One and four tenths.
1.4
one and four tenths one dollar and forty cents, if currency for example
eight and four tenths
Four tenths = 0.4
1.4
One and four tenths miles.
One and four tenths
One and four tenths.
It is 1.4
0.4 = four tenths.