\[\boxed{\mathbf{463}.}\]
\[1)\ 17,5\ :7 = 175\ :70 = 2,5\]
\[2)\ 20,4\ :24 = 204\ :240 = 0,85\]
\[3)\ 453,2\ :22 =\]
\[= 4532\ :220 = 20,6\]
\[4)\ 5,49\ :6 = 549\ :600 = 0,915\]
\[5)\ 0,1242\ :6,9 =\]
\[= 1242\ :69\ 000 = 0,018\]
\[6)\ 0,02592\ :0,048 =\]
\[= 2592\ :4800 = 0,54\]