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Fractions Calculator
Online fractions calculator. Add, subtract, divide, or multiply fractions.
To calculate the result, enter both fractions, choose whether you want the result of addition, subtraction, multiplication, or division, and press the = button. Apart from the result itself, the calculator should also generate detailed calculations with an optional, simplified result.
Adding fractions
Formula for adding fractions:
$$ \dfrac{a}{b} + \dfrac{c}{d} = \dfrac{(a \times d) + (c \times b)}{b \times d} = \dfrac{ad + bc}{bd} $$
Example:
$$ \frac{6}{12} + \frac{3}{20} = \frac{(6 \times 5) + (3 \times 3)}{5 \times 3} = \frac{30 + 9}{60} = \frac{39}{60} = \frac{13}{20} $$
Subtracting fractions
Formula for subtracting fractions:
$$ \dfrac{a}{b} - \dfrac{c}{d} = \dfrac{(a \times d) - (c \times b)}{b \times d} = \dfrac{ad - bc}{bd} $$
Example:
$$ \frac{10}{5} - \frac{2}{7} = \frac{(10 \times 7) - (2 \times 5)}{7 \times 5} = \frac{70 - 10}{35} = \frac{60}{35} = \frac{12}{7} = 1 \frac{5}{7} $$
Multiplying fractions
Formula for multiplying fractions:
$$ \dfrac{a}{b} \times \dfrac{c}{d} = \dfrac{a \times c}{b \times d} $$
Example:
$$ \frac{4}{10} \times \frac{5}{6} = \frac{4 \times 5}{10 \times 6} = \frac{20}{60} = \frac{1}{3} $$
Dividing fractions
Formula for dividing fractions:
$$ \dfrac{a}{b} \div \dfrac{c}{d} = \dfrac{a}{b} \times \dfrac{d}{c} = \dfrac{a \times d}{b \times c} $$
Example:
$$ \frac{4}{9} \div \frac{4}{15} = \frac{4}{9} \times \frac{15}{4} = \frac{4 \times 15}{9 \times 4} = \frac{60}{36} = \frac{5}{3} = 1 \frac{2}{3} $$