Hello Camille,
To solve this inequality
15p < 16 (original problem)
15p/15 < 16/15 (divide both sides by 15)
p < 1.067
Since, there is (<) in this inequality for graphing use open circle. On number line locate 1.067 and put an open circle on 1.067. Then shade the left side of the number line, that is your answer. All values less than 1.067 is the answer.
Good luck.