Hi There!
So basically you have to add, whenever you add with the same denominator you just add the numerator.
Steps
1. Add [tex] \frac{4}{5} [/tex] + [tex] \frac{1}{5} [/tex]
2. Since they have the same denominators add the numerators, 1+4=5
3. You're total answer should be [tex] \frac{5}{5} [/tex], whenever you get the same number in the numerator and the denominator the answer will always be one.
Final Answer, [tex] \frac{1}{5} [/tex] + [tex] \frac{4}{5} [/tex] equals to one.
Hope This Helps :)
