Hi can someone please help me on this question:

To determine the popularity of introducing a creche facility, a large organisation undertook a survey of its members of staff. it was found that of the 9% of staff who had children younger than school age, 50% would consider placing their children in the office creche. Determine the proportion of total staff who would be interested in using the creche ( as a decimal to 3 dec pl.) ( It is assumed there are no couples who both work in the organistion).

Thank You very much =)