How to Calculate Fractions
Fractions represent parts of a whole. A fraction has a Numerator (top number) and a Denominator (bottom number).
[Image of parts of a fraction]Adding & Subtracting
To add fractions, you must find a common denominator. For example, to add 1/2 + 1/4, you change 1/2 to 2/4. Then you can add the tops: 2/4 + 1/4 = 3/4.
Multiplying Fractions
This is the easiest operation. Simply multiply the tops together and the bottoms together.
(1/2) × (3/4) = (1×3) / (2×4) = 3/8
Dividing Fractions
Use the "Flip and Multiply" method. To divide by a fraction, flip it upside down (reciprocal) and multiply instead.
(1/2) ÷ (1/4) = (1/2) × (4/1) = 4/2 = 2