Answer:
20
Step-by-step explanation:
One way you can solve this is by getting your trusty calculator and dividing 2 by 5(as that is how you turn fractions into decimals)
That way you get .4
Using this same calulator you multiply .4 and 50, and get 20.
(or this is how I did it)
Edit: You can also add 0s to both 2 and 5 to make the fraction 20/50, which is technically equal.