Final answer:
By dividing 38,200 by 0.098, it is estimated that approximately 389,796 copies of the book have been sold to date.
Step-by-step explanation:
The student asked how many copies a book has sold to date if 38,200 copies represent 9.8% of the total sales. To find the total, we treat the problem as finding the whole when a percentage part is known. Since 9.8% or 0.098 of the total is 38,200, we can set up the equation 0.098 * total = 38,200. By dividing both sides by 0.098, we find the total number of copies sold to date.
total = 38,200 / 0.098 = 389,795.92
Considering book sales are typically whole numbers, we can round up to the nearest whole number, suggesting that approximately 389,796 copies of the book have been sold to date.