📐 Math Grades 3–7
Fraction Tools
See fractions as bars, then do the math with each step shown. Great for checking homework.
Learn How it works
- A fraction a/b means a parts out of b equal parts. The bottom number is the denominator; the top is the numerator.
- Simplify: divide top and bottom by their greatest common factor (GCF). 8/12 → ÷4 → 2/3.
- Add or subtract: get a common denominator first. 1/2 + 1/3 = 3/6 + 2/6 = 5/6.
- Multiply: top × top and bottom × bottom. 2/3 × 3/4 = 6/12 = 1/2.
- Divide: keep, change, flip. 1/2 ÷ 1/4 = 1/2 × 4/1 = 2.
Try it Fraction calculator
Type fractions like 3/4, mixed numbers like 1 1/2, or whole numbers.
Practice Check yourself
Answer, then tap Check. You get an explanation either way.
3/5 = 9/15 and 2/3 = 10/15.