(- 0.5) - (3 and 1 / 4) + 6.75-5 and 1 / 2,

(- 0.5) - (3 and 1 / 4) + 6.75-5 and 1 / 2,

3 and 1 / 4 = 3.25
5 and 1 / 2 = 5.5
Original formula = (- 0.5) - 3.25 + 6.75-5.5 = - 2.5