I don't KNOW any of those. They require a bit of calculation.

Multiply mixed fractions by makign them improper fractions. Then multiply numerators and denominators. There may be reductions and simplifications along the way.

#8. 2 2/5 times 1 6/7?

2 2/5 = 12/5

1 6/7 = 13/7

(12/5)*(13/7) = 156/35

Done. (Unless someone has a particular hatred for improper fractions)