The 16-ounce container is full (100% capacity). We need to pour the liquid until it is filled at 87.5% of its capacity. We calculate the 87.5% of 16 ounces:
87.5% of 16 ounces = (87.5*16/100) ounces = 14 ounces
We conclude that when the 16-ounce container is 87.5% filled, it will contain 14 ounces. So 2 ounces will need to be poured from the full 16-ounce container.