so i take "one hundred and twenty five " to be one full numer: 125
(my alternative understanding is that 100 is a full integer and only 25 thousands, but I don't think that's what the question meant)
thousands: this means that the number will have a form of
x.xxx
(because the smallest number of this form, 0.001 is one thousandth.
so we fill it in:
0.125
and that's the answer!!
(we fill right to left: so if the number was for exmple 25, we'd have to fill it in with 0:
0.025)