Hello there.
Question: How do you convert 250% into a fraction.
Answer: Step 1: Factor both the numerator and denominator down to prime factors:
250 = 2 * 53 
100 = 22 * 52
Step 2: Calculate the greatest common factor, GCF 
GCF = (2 * 53; 22 * 52) = 2 * 52 
Step 3: Divide both the numerator and denominator by their greatest common factor, 250/100 =
(2 * 53)/(22 * 52) = 
((2 * 53) : (2 * 52)) / ((22 * 52) : (2 * 52)) =
5/2
Ways of writing this:
Positive improper fraction: 
250/100 = 5/2 
Mixed number (also called mixed fraction): 
250/100 = 2 1/2 
Decimal number: 
250/100 = 2.5
In short, Your answer is 5/2.
Hope This Helps You!
Good Luck Studying ^-^