What is the percentage of employees are in Paris office?
DIVIDE(COUNT(employeeNumber) when city = 'Paris'), (COUNT(employeeNumber)) as percentage;
SELECT CAST(COUNT(CASE WHEN t1.city = 'Paris' THEN t2.employeeNumber ELSE NULL END) AS REAL) * 100 / COUNT(t2.employeeNumber) FROM offices AS t1 INNER JOIN employees AS t2 ON t1.officeCode = t2.officeCode