Amber had \(\frac{3}{8}\) of a cake left after her party. She wrapped a piece that was \(\frac{1}{4}\) of the original cake for her best friend. What fractional part did she have left for herself?
Wesley bought \(\frac{1}{2}\) pound of nails for a project. When he finished the project, he had \(\frac{1}{4}\) pound of the nails left. How many pounds of nails did he use?