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_29538735_1 (tonnes_of_co2_saved VARCHAR, _percentage_electricity_reduction VARCHAR)
### Question:
When 8.9% is the electricity reduction percentage how many sets of tonnes of co2 saved is there?
### Answer:
SELECT COUNT(tonnes_of_co2_saved) FROM table_29538735_1 WHERE _percentage_electricity_reduction = "8.9%"