Why are there 2 LCM symbols on my paper. I don't think there are two lowest common multiples?

Matteo makes raspberry punch. the table shows how many parts ginger ale and raspberry juice to use for a batch. raspberry punch parts ginger ale 2 parts raspberry juice 3 matteo decides to add one part of raspberry juice. what is the new ratio of ginger ale to raspberry juice?

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Which is a graph of a proportional relationship?