A large number of math careers are still based within business or science and technology-related sectors, with math graduates occupying roles such as accountant, actuary, statistician, technician, economist or market researcher.
By studying math you develop analytical skills and an analytical attitude.
A degree in mathematics, especially if accompanied by a transcript showing good grades in math courses, signals to a prospective employer or admissions officer that you are capable of learning the kinds of analytical procedures that are required in a given job or profession, even if those procedures are not specifically mathematical.
With a mathematics degree, you should be able to turn your hand to finance, statistics, engineering, computers, teaching or accountancy with a success not possible to other graduates. This flexibility is even more important nowadays, with the considerable uncertainty as to which areas will be the best for employment in future years.