Fraction formulas
Add: a/b + c/d = (ad + bc) / bd
Subtract: a/b − c/d = (ad − bc) / bd
Multiply: a/b × c/d = ac / bd
Divide: a/b ÷ c/d = ad / bc
FAQ
How do I simplify a fraction?
Divide both numerator and denominator by their greatest common divisor (GCD). For example, 12/18: GCD(12,18) = 6, so 12/18 = 2/3.
How do I convert a fraction to a decimal?
Divide the numerator by the denominator. For example, 3/4 = 0.75.