hasil dari -31/4+3(2/5:3/4)

-31/4 + 6/15÷9/12
=> - 31/4 + 6/15 × 12/9
=> - 31/4 + 72/175
=>

= -13/4 + 3 (2/5 x 4/3)
= -13/4 + 3 (8/15)
= -13/4 + 24/15
= -210/60 + 96/60
=-114/60
= - 57/30 = - 1 9/10