Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_222448_1 (percentage_yield VARCHAR, dpmo VARCHAR)
### Question:
What is the percentage yield for a DPMO of 3.4?
### Answer:
SELECT percentage_yield FROM table_222448_1 WHERE dpmo = "3.4"