※ 질문하기질문내용 A good option for business people these days is to open a franchise. In fact, it is one of the fastest growing market areas in the world. It is an authority that is given by a company to someone, allowing them to sell its goods or services. In most cases, a person who does it needs to pay a franchise fee to use the name of the product or service. The company also receives a percentage of the gross sales of the franchise. In return for these payments, it will assist the business person in designing the store, ordering products, and hiring and training employees. It has become common in industries such as food service, beauty products, and sportswear.

위 빨간색으로 칠해 놓은 것이 가리키는 바가 아래 제가 이해한 것이 맞는지요?
순서대로 정리하였습니다.

it- a franchise
it - a franchise
them - business people
it - to sell its goods or services
it-a franchise
it - a franchise

The company also receives a percentage of the gross sales of the franchise.
-- 이 문장 해석시 a percentage 에서의 a는 1% 가 아니라 일정한 이라고 해석을 해야 하는지요?