How mixed numbers work in this calculator
A mixed number like 1½ is really just a compact way of writing 3/2 — a whole part plus a fraction part. Behind the scenes, every mixed number you enter is first converted to that equivalent improper fraction, the arithmetic is done there, and the result is converted back to a mixed number for display alongside the exact improper-fraction form.
whole a/b = (whole×b + a) / b Example: 1½ = (1×2 + 1) / 2 = 3/2 For a negative mixed number like −1½, the negative sign applies to the whole value (−3/2), not just the whole-number part — entering a negative whole number here works the way you'd expect.
Frequently asked questions
How do you add two mixed numbers?
Convert each mixed number to an improper fraction first, add them using a common denominator, then convert the result back to a mixed number if it's larger than 1. 1½ + 2¼ = 3/2 + 9/4 = 15/4 = 3¾.
How do I enter a mixed number here?
Type the whole number in the small box to the left, and the fraction part in the numerator/denominator boxes. Leave the whole-number box empty for a plain fraction.
How do I enter a negative mixed number?
Put the minus sign on the whole-number box, e.g. -1 for −1½ with 1/2 as the fraction part. The sign applies to the entire mixed number, not just the whole-number portion.