Question

Though the percentages are not always the same, a general rule in business says that the large majority of a firm’s revenues come from what percent of its customers?

Answer 1

Though the percentages are not always the same, a general rule in business says that the large majority of a firm’s revenues come from 20 percent of its customers.

80/20 rule

The general rule has the idea that 80 percent of a firm's sales are obtained from 20 percent of its customers.