This essay is aiming to show the applicant’s talent and love toward math, and how it inspired the applicant to choose his career path.
Original detailed description is provided below:
Think about an academic subject that inspires you. Describe how you have furthered this interest inside and/or outside of the classroom.

Things to consider: Many students have a passion for one specific academic subject area, something that they just can’t get enough of. If that applies to you, what have you done to further that interest? Discuss how your interest in the subject developed and describe any experience you have had inside and outside the classroom — such as volunteer work, internships, employment, summer programs, participation in student organizations and/or clubs — and what you have gained from your involvement.

Has your interest in the subject influenced you in choosing a major and/or future career? Have you been able to pursue coursework at a higher level in this subject (honors, AP, IB, college or university work)? Are you inspired to pursue this subject further at UC, and how might you do that?
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Here is the story I want you to write about:
The applicant has outstanding talent in math, which inspired him into choosing economics as his career goal. There are many examples you can use to better support this: math competition, talent, help family financial planning, etc.
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Enclosed are the applicant’s personal statement and an essay on the topic of why he wants economics as his major.