1. **State the problem:** Nikola had 77 units of money. She spent \(\frac{3}{7}\) of her money on a meal and the rest on books. We need to find the percentage of her money spent on books, rounded to 2 decimal places. 2. **Formula and rules:** - Total money = 77 - Fraction spent on meal = \(\frac{3}{7}\) - Fraction spent on books = \(1 - \frac{3}{7} = \frac{4}{7}\) - Percentage spent on books = \(\left(\frac{4}{7}\right) \times 100\%\) 3. **Calculate the fraction spent on books:** \[ \frac{4}{7} = 0.5714285714 \] 4. **Convert to percentage:** \[ 0.5714285714 \times 100 = 57.14285714\% \] 5. **Round to 2 decimal places:** \[ 57.14\% \] **Final answer:** Nikola spent **57.14%** of her money on books.