Hasil dari (8:4/5)-(3×9/2)

(8:4/5)-(3×9/2)
=(8×5/4)-(3×9/2)
=40/4 – 27/2
=40/4 – 54/4
= -14/4

(8.5/4) – (3.9/2)
= 10-27/2
=-7/2
=-3 1/2