Fraction, Ratio & Proportion Calculators
Work exactly with fractions and ratios: add, subtract, multiply and divide fractions, convert between mixed and improper forms, reduce to lowest terms, turn fractions into decimals, and simplify or solve ratios and proportions.
Fraction Calculator
Add, subtract, multiply and divide fractions — exact, reduced, with a mixed-number form and inverse check.
e.g. 1/2 + 1/3StepsExact resultDecimal result
Ratio Calculator
Simplify a ratio of two or more terms to lowest form via the GCF, with a coprime check.
e.g. Simplify 20:30StepsExact resultVerified
Fraction Simplifier
Reduce a fraction to lowest terms by dividing by the GCF, with a proof it cannot reduce further.
e.g. Simplify 18/24StepsExact resultDecimal result
Fraction → Decimal
Convert a fraction to a decimal by long division, detecting terminating and repeating decimals.
e.g. 3/8StepsExact resultDecimal result
Mixed & Improper Numbers
Convert between mixed numbers and improper fractions, reduced, with a reverse-conversion check.
e.g. 2 1/4 → improperStepsExact resultDecimal result
Percentage Calculator
Percentage of a number, reverse percentages, percent change and a shareable claim check.
e.g. 35% of 240StepsMultiple methods
Proportion Solver
Solve a proportion a/b = c/x for the missing value by cross-multiplication, with an equality check.
e.g. 2/3 = 4/xStepsExact resultDecimal result