A business has two different offices, one in London, the other in New York. The ratio of the number of staff at the London office to New York office is 3:5
Employees of the business are either part time or full time.
In London 30% of the staff are part time
In New York 20% of the staff are part time
Given that the business has 38 part-time members of staff, work out the total number
of employees.