Answer:
[tex]\frac{8}{10}[/tex]
Step-by-step explanation:
The missing number in the denominator would be 10, because 4 divided by 5 is 0.8, and 8 divided by 10 is also 0.8, making them congruent to one another.
You can also simplify/reduce [tex]\frac{8}{10}[/tex] by divided the numerator and the denominator by its common factor, 2. This gives you the fraction of [tex]\frac{4}{5}[/tex], proving they are equivalent to one another.
