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_29538735_1 ( universities VARCHAR, _percentage_electricity_reduction VARCHAR )

### Question ###
When 10% is the percentage of electricity reduction how many sets of universities are there?

### Accurate SQL ###

SELECT COUNT(universities) FROM table_29538735_1 WHERE _percentage_electricity_reduction = "10%"