Roman numerals do not permit the use of fractions.
However, 70/100ths would probably be notated as LXX / C
Eight hundredths in standard numerals = 0.08
.40
0.40
0.16
It is 4.03
It is 0.70
It is 46.67
It is 70/100, which can be simplified, if required.
When written out in numerals, twenty one and five hundredths is 21.05
One hundred and six hundredths is written as 100.06 in numerals.
Exactly as in the question 70 but if you mean in Roman numerals then it is LXX
0.7=7/10=70/100