Answer:
Hey there!
The question is basically asking for you to solve a fraction subtraction problem, and fill in the missing values as you solve.
The given problem is 2/3 - 1/2. However, we can't subtract right now, since the denominators are different.
2/3 can be expressed as 4/6, and 1/2 can be expressed as 3/6.
Thus, the missing denominator in line one is 6 and the missing numerator in line one is 3.
4/6-3/6=1/6.
Thus, the numerator in line two should be 1.
From top to bottom, the numbers in the three boxes should be 6, 3, and 1.
This can be a confusing topic, especially if you're just learning it. Let me know if you need additional help :)