neuf un cinq (nine one five)
or
neuf cent quinze (nine hundred and fifteen)
Neuf cent quinze.
Nine hundred fifteen.
novecientos quince
915 is an integer and not a fraction but, if you must, you could write it as 915/1
915 = CMXV
130.7143
915 305,3 61,5,3
Exactly 915.
915 / 2 is equal to 457.5
915 x 10 = 9150
915/1 is one possible answer.
915 x 30 = 27450