in order to solve this question, you just need to equalize the denominator
in 8/9 , 8 is the numerator and 9 is the denominator
in 1/3, 1 is the numerator and 3 is the denominator
in order to change 1/3 into denominator 9, you just need to multiply both numerator and denominator with 3 , which give us :
1/3 = 3/9
now back to the question
Alice has 8/9 , and ate 3/9 of them, this will give us :
8/9 - 3/9 = 5/9 which is left
so the answer is option D
hope this helps
