30.15
6.15 in word form is "six and fifteen hundredths." This is because the number 6 is read as "six," the decimal point is read as "and," and the digits after the decimal point are read individually as "fifteen hundredths."
1.150 = one and fifteen hundredths
To write 3.15 in word form, you would write "three and fifteen hundredths." This breaks down the decimal number into its whole number part (3) and its decimal part (15 hundredths). Using the word "and" to separate the whole number from the decimal part is a common convention in English.
Two and fifteen hundredths. (I'm pretty sure)
2.15
0.15
4.15
0.15
Fifteen hundredths.
0.15
5.15
5.15
8.15
30.15
15/100 converted to a decimal is 0.15.
0.15 = fifteen hundredths