Write the number fifteen and thirty-three thousandths

Question

don't  know how to start it 

Answer 1

the word "and" implies the decimal point

15. so far

now find the thousandths place

15. _ _ _

you have 33 thousandths

take the right-most digit and put it in the thousandths place

15. _ _ 3

now work backwards to the left and put the next digit, the other 3, in the hundredths place

15. _ 3 3

there are no more digits left so put a "0" in the tenths place

15.033 and you're done