The expression is
.
Place value chart for
and
.
Line up the decimal points and draw a line below the numbers.
\Annex zero to align the numbers.
\
First find the difference of the hundredths digit.
\The difference of the hundredths digit = 8
0 = 8.

Next find the difference of the tenths digit.
\The difference of the tenths digit = 12
4 = 8.

Next find the difference of the ones digit.
\The difference of the ones digit = 4
3 = 1.

The difference is 1.85.