In decimal fractions the point (.) is used after the whole number in distinction from Russian, where comma (,) is used and where this sign is not read. But in Russian we must always say – десятых, сотых, тысячных и т. д., in English it is suffice
to write (.) and to say “point”: 0.5 – nought [n]:t] or O [ou] point five or.5 – point five; 1.3 – one point three; 10.35 – ten point three five; 5.253 – five point two five three; 0.001 – point OO one, or point nought nought one; point two noughts
one; point two Oes one.
After the point (.) all numbers are read separately.
Nought, O may often be omitted but the point (.) is never omitted because it shows that the number is a decimal fraction. In the USA “O” is preffered to be read as “zero”.
The point (.) may be written in the upper, middle or down part of the decimal fraction: 2.5; 2·5; 2?5.