음what is 1/8 divided by 3/4 equal

Pls! does anybody know a shortcut for answering these types of questions in the future?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.