(-5/12 - 7/30) : 13/15 = - 3/4.
1) - 5/12 - 7/30 = - 25/60 - 14/60 = - 39/60 = - 13/20
2) - 13/20 : 13/15 = - 13/20 · 15/13 = = - 15/20 = - 3/4
(-5/12 - 7/30) : 13/15 = - 3/4.
1) - 5/12 - 7/30 = - 25/60 - 14/60 = - 39/60 = - 13/20
2) - 13/20 : 13/15 = - 13/20 · 15/13 = = - 15/20 = - 3/4