How to Add and Multiply Fractions (With Examples)
Short answer
To add fractions, use a common denominator. To multiply, multiply across. Example: 1/2 + 1/3 = 5/6. Always simplify by dividing by the GCD.
Fraction arithmetic is a school staple and a cooking essential. Practise with the fraction calculator.
Addition and subtraction
Rewrite with LCD, combine numerators, simplify.
Multiplication and division
Multiply numerators and denominators. Divide by multiplying by the reciprocal.
Mixed numbers
Convert to improper fractions first (2 1/3 β 7/3).
Link to percentages
3/4 = 75% β see the percentage calculator.
Open the free final grade calculator.
Related: how to calculate area of shapes.
Related: how to calculate percentage of a number.
Related: how to calculate grade percentage.
More practice
Change the inputs, rewrite the formula from memory, then confirm with the tool. Keep units consistent and read the disclaimer on tax or health pages before acting on a number.
Frequently asked questions
How do I add two fractions?
Common denominator, add tops, simplify.
How do I multiply fractions?
Multiply tops and bottoms, then simplify.
What does simplify mean?
Divide numerator and denominator by their greatest common divisor.
Can the calculator handle mixed numbers?
Yes β enter the whole part and the fraction parts.