Fill in the missing fraction.
I need help on this, I'm very confused.

*edit
Answer:
4/5
Step-by-step explanation:
you'd do 4 divided by 2 which is 2, then you'd do 10 divided by 2 which is 5. so you get 4/5.
Answer:
4/5
Step-by-step explanation:
What is 4/10 * 2?
4/10 * 2/1 = 8/10.
8/10 can then be simplified into 4/5.