6 min read
2026-02-01
The fraction calculator performs all arithmetic operations with common, mixed, and decimal fractions.
For a common fraction: enter the numerator and denominator
For a mixed number: specify the whole part, numerator, and denominator
For a decimal fraction: enter the number with a period
Find the common denominator (LCM of the denominators)
Convert fractions to the common denominator
Add the numerators
Simplify the result
Adding 2/3 + 3/4:
LCM(3, 4) = 12
2/3 = 8/12, 3/4 = 9/12
8/12 + 9/12 = 17/12 = 1 5/12
The calculator shows each step of the solution and automatically simplifies the result to lowest terms.
See also: GCD and LCM, Equation Solver, Proportion Calculator