Mathematics for IGCSE & O level - The Four Operations (Section 7 - No. 25)
How do you find the answer to a question like $\frac{1}{2} + \frac{1}{4}$?
Add both numerators and denominators.
Find a common denominator and add the numerators.
Subtract both numerators and denominators.
Multiply both fractions.
Paliwanag
To add fractions, you must find a common denominator, rewrite the fractions with that common denominator, and then add the numerators.