-7"16+3"16(4,79-3,151,6)=
-7"16 + 3"16 \ (4.79 - 3.151.6) =
-7"16 + 3"16 \ (4.79 - 5.04) =
-7"16 + 3"16 (-0.25) =
-4"16 (-0.25) =
-1"16
So, the result is -1"16.