Fraction Calculator
Add, subtract, multiply or divide two fractions. This calculator with fractions finds the common denominator, simplifies the answer to lowest terms, and shows every step, plus the decimal and mixed-number form.
Want to solve ANY math problem? Just take a screenshot.
Math.Photos handles algebra, calculus, geometry, statistics, and more — all from a photo or your handwritten notes.
20 free solves · no credit card · no account needed to start
Fraction Arithmetic
How It Works
Adding & Subtracting Fractions
Find the Least Common Denominator (LCD) of both fractions, convert each fraction to have that denominator, then add or subtract the numerators. Simplify the result.
Multiplying Fractions
Multiply the numerators together and the denominators together. Then simplify by dividing both by their Greatest Common Divisor (GCD).
Dividing Fractions
Flip the second fraction (reciprocal) and multiply. "Keep, Change, Flip" — keep the first fraction, change ÷ to ×, flip the second.
Simplifying Fractions
Find the GCD of the numerator and denominator using the Euclidean algorithm, then divide both by it. The result is the fraction in lowest terms.
Related Tools
Already did the work? Get it checked instead.
A calculator gives you an answer. It doesn't tell you which line of your working went wrong. Photograph your own steps — handwritten notebook, whiteboard, or a screenshot of an online assignment — and Math.Photos checks them line by line, then points at the exact step where the sign flipped.
Reads handwriting
Photo of your notebook, not a retyped expression.
Step-level verdict
"Line 3 dropped a negative", not just "wrong".
Teach Me mode
Questions that lead you to the fix, not the answer.
Pricing
Start free — 20 solves, no card. Upgrade only when you run out.
Lite
$1.99 /month
50 solves/month
Enough for a weekly problem set.
Student
$4.99 /month
500 solves/month
Every assignment, all semester, plus Teach Me mode.
Pro
$9.99 /month
3,000 solves/month
Multi-device sync and LaTeX/PDF export.
Annual billing saves 37%. Cancel anytime — see full plan comparison.
Need more than a fraction calculator?
Math.Photos solves any math problem from a screenshot — algebra, calculus, geometry, statistics, and more. With step-by-step explanations.
Install20 free solves · no credit card