Plsss help I’m terrible at algebra

How do you multiply a mixed fraction by a regular fraction

Abaker makes 186 cookies. some are chocolate chip and some are oatmeal raisin, and both kinds are made with and without nuts, as shown in the table above. because they are more popular, the baker made 2/3 of the cookies chocolate chip. if a chocolate chip cookie is chosen at random, what is the probability that it will have nuts? a) 21/93 b) 21/62 c) 41/93 d) 21/41

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g