Percentage calculator
Calculate the percentage of a number, a percentage increase and a percentage decrease. Free percentage calculator.
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Fraction Calculator
Enter two fractions and select an operation — the calculator returns the result as a simplified fraction and decimal.
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How we calculate fractions
For addition/subtraction we find the common denominator (LCM). For multiplication we multiply numerators and denominators. For division we multiply by the reciprocal. Result is simplified using GCD.
Example: 1/2 + 1/3
1/2 + 1/3 = 3/6 + 2/6 = 5/6 ≈ 0.833
Frequently asked questions
How do you add fractions?
Find a common denominator (LCM of denominators), convert both fractions, then add numerators.
How do you subtract fractions?
Same as addition — find common denominator, then subtract numerators.
How do you multiply fractions?
Multiply numerators together and denominators together: a/b × c/d = (a×c)/(b×d).
How do you divide fractions?
Multiply by the reciprocal: a/b ÷ c/d = a/b × d/c.
How do you simplify a fraction?
Divide both numerator and denominator by their greatest common divisor (GCD).
What is a proper fraction?
A fraction where the numerator is less than the denominator, e.g. 3/4.
What is an improper fraction?
A fraction where the numerator is greater than or equal to the denominator, e.g. 7/4.
What is the GCD?
GCD (Greatest Common Divisor) is the largest number that divides both numerator and denominator evenly.
What is the LCM?
LCM (Least Common Multiple) is the smallest number that both denominators divide into — used for addition/subtraction.
Can I use this calculator for mixed numbers?
Convert mixed numbers to improper fractions first: 1 3/4 = 7/4. Then use the calculator.
This calculator is for educational purposes.
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