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_31191 ( "Year" text, "Universities" real, "No. of Students Signed up" real, "% electricity reduction" text, "Tonnes of CO2 Saved" real, "\u00a3 Saved" text )

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

### Accurate SQL ###

SELECT COUNT("Universities") FROM table_31191 WHERE "% electricity reduction" = '10%'