How to calculate fraction ↔ decimal
Decimal = numerator ÷ denominator
Worked example. Decimal: 0.375.
Example inputs — Numerator: 3; Denominator: 8. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
A fraction is a division: divide the numerator by the denominator to get the decimal, then multiply by 100 for the percent.
Assumptions & limitations
- Results are rounded for display.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
How do I turn a decimal into a fraction?
Write it over a power of 10 (0.375 = 375/1000), then simplify by the greatest common factor (375/1000 = 3/8).