Add, subtract, multiply, and divide fractions with automatic simplification. Convert between mixed numbers and improper fractions.
A fraction represents a part of a whole. It consists of two numbers separated by a line: the numerator (top) and denominator (bottom).
Numerator (3) = parts we have
Denominator (4) = total parts
Numerator < Denominator (e.g., 3/4)
Numerator ≥ Denominator (e.g., 5/4)
Whole number + fraction (e.g., 1 1/4)
Find a common denominator, then add or subtract the numerators.
Multiply numerators together and denominators together.
Multiply by the reciprocal (flip the second fraction).
Divide both numerator and denominator by their GCD.
| Fraction | Decimal | Percentage |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.333... | 33.33% |
| 1/4 | 0.25 | 25% |
| 1/5 | 0.2 | 20% |
| 3/4 | 0.75 | 75% |
| 2/5 | 0.4 | 40% |
Use the least common multiple (LCM) of the denominators for easier calculations.
Reduce fractions to their simplest form by dividing by the greatest common divisor (GCD).
Convert mixed numbers to improper fractions before performing operations.
Convert your answer to a decimal to verify it makes sense.
Calculate percentages and percentage changes
Calculate percentage increase
Calculate percentage decrease
Calculate percentage difference
Calculate ratios and proportions
Calculate mean average