When an object is divided into a number of equal parts then each part is called a fraction. A proper fraction has numerator and denominator mutually prime.
The amount of cake maria has is [tex] 8X [/tex]. [tex] X [/tex] is some positive real number.
She eats 3 slices, then the amount of cake left with Maria is [tex] 8X-3X=5X [/tex].
The fraction of cake left with Maria is [tex] \frac{5X}{8X}= \frac{5}{8} [/tex].
