1. **State the problem:** We know that 38,100 copies sold represent 8.9% of the total copies sold to date. We need to find the total number of copies sold to date. 2. **Formula used:** To find the total when given a part and its percentage, use the formula: $$\text{Total} = \frac{\text{Part}}{\text{Percentage as a decimal}}$$ 3. **Convert the percentage to decimal:** $$8.9\% = \frac{8.9}{100} = 0.089$$ 4. **Substitute the values into the formula:** $$\text{Total} = \frac{38100}{0.089}$$ 5. **Calculate the total:** $$\text{Total} = 38100 \div 0.089$$ 6. **Perform the division:** $$\text{Total} = 38100 \times \frac{1}{0.089} = 38100 \times 11.23595505618 \approx 427,528.09$$ 7. **Round to the nearest whole number:** $$\boxed{427,528}$$ **Answer:** Approximately 427,528 copies have been sold to date.