Comparing Fractions Calculator
The Comparing Fractions Calculator tells you which of two fractions is larger using cross-multiplication, and shows their decimal values. Enter both numerators and denominators.
Formula
Compare a/b and c/d by cross-multiplying: a·d vs c·b
- If a·d > c·b then a/b is larger (for positive denominators).
- Cross-multiplication avoids finding a common denominator.
3/4 vs 5/8
Inputs
- Numerator 1: 3
- Denominator 1: 4
- Numerator 2: 5
- Denominator 2: 8
3×8 = 24 and 5×4 = 20, so 3/4 > 5/8.
Frequently asked questions
How do you compare two fractions?
Cross-multiply: compare a×d with c×b. The fraction on the side of the larger product is bigger.