Negative 16 and 3 / 4 - negative 10 and 1 / 4 - positive 1 / 2 =?

Negative 16 and 3 / 4 - negative 10 and 1 / 4 - positive 1 / 2 =?

(negative 16 and 3 / 4) -- (negative 10 and 1 / 4) -- (- 1 / 2)
=-16.75+10.25-1.5
=-6.5-1.5
=8