Question

(-3 pe 4-1pe8: 3 pe 4): +13 pe 8

Answer 1

(-3/4-1/8: 3/4): (+13/8)=
=(-3/4-1/8 × 4/3) : 13/8=
=(-3/4-1/6) × 8/13=
=(-9-2)/12 × 8/13=
=-11/12 × 8/13=
=-11/3 × 2/13=
=-22/39