1. **State the problem:** Jordan uses 24 pints of paint in total. One quarter ($\frac{1}{4}$) of this paint is green, and the rest is blue. We need to find how many pints of blue paint she used. 2. **Formula and rules:** To find the amount of green paint, multiply the total paint by $\frac{1}{4}$. The blue paint is the total paint minus the green paint. 3. **Calculate green paint:** $$\text{Green paint} = 24 \times \frac{1}{4} = \frac{24}{4} = 6$$ 4. **Calculate blue paint:** $$\text{Blue paint} = 24 - 6 = 18$$ 5. **Answer:** Jordan used **18** pints of blue paint to paint her bedroom walls.