The sphere correction in Ally's left eye is +4.4, in her right eye it's -2.5. An object must be at least 19.8 centimeters from her left eye before she can see it in focus and at least 13.7 centimeters from her right eye before she can see it in focus. One of her eyes has a larger amplitude of accommodation than the other; how many percent larger is it? (for example, one could say something like "Ally's left eye has a 35% larger amplitude of accommodation than her right eye")

The correct answer is 96.9% but i dont know how to get there.