A baker buys a 5 lb bag of sugar. She uses \(1\cfrac{2}{3}\) lb to make some muffins and \(2\cfrac{3}{4}\) lb to make a cake. How much sugar does she have left?
A boxer needs to lose \(3\cfrac{1}{2}\) kg in a month to be able to compete as a flyweight. In three weeks, he lowers his weight from 55.5 kg to 53.8 kg. How many kilograms must the boxer lose in the final week to be able to compete as a flyweight?