Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_31 (mobile VARCHAR, opera VARCHAR)

### Question ###
What percentage of users were using mobile browsers during the period in which 2.62% were using Opera?

### Accurate SQL ###

SELECT mobile FROM table_name_31 WHERE opera = "2.62%"