What is the % Change at London Heathrow airport?
CREATE TABLE table_name_68 (_percentage_change VARCHAR, airport VARCHAR)
SELECT _percentage_change FROM table_name_68 WHERE airport = "london heathrow airport"
### Context: CREATE TABLE table_name_68 (_percentage_change VARCHAR, airport VARCHAR) ### Question: What is the % Change at London Heathrow airport? ### Answer: SELECT _percentage_change FROM table_name_68 WHERE airport = "london heathrow airport"