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_name_66 (internet_explorer VARCHAR, mobile VARCHAR)
### Question:
What percentage of users were using Internet Explorer during the period in which 2.1% were using mobile browsers?
### Answer:
SELECT internet_explorer FROM table_name_66 WHERE mobile = "2.1%"