You can draw a circle to represent 1 and divide it in half. Each part represents [ggfrac]1/2[/ggfrac]. So you have two [ggfrac]1/2[/ggfrac]s. You keep drawing halves until you have five [ggfrac]1/2[/ggfrac]s. You find that [ggfrac]1/2[/ggfrac] × 5 = [ggfrac]5/2[/ggfrac] , so [ggfrac]2/5[/ggfrac] is the wrong answer.