Add, subtract, multiply and divide fractions with automatic simplification.
Add, subtract, multiply and divide fractions with automatic simplification.
Enter values above and click Calculate — results will appear here with the formula explained.
Fractions are added or subtracted by rewriting both over a common denominator, then combining the numerators. Multiplication is simpler: multiply the numerators together and the denominators together.
Division works like multiplying by the reciprocal — flip the second fraction upside down and multiply. Every result here is simplified by dividing out the greatest common divisor, and improper fractions are also shown as mixed numbers.
Mixed numbers such as 1½ are supported: enter the whole part along with the numerator and denominator, and they are converted internally to improper fractions first.
Advertisement
AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID
Fractions are added or subtracted by rewriting both over a common denominator, then combining the numerators. Multiplication is simpler: multiply the numerators together and the denominators together. Formula: a/b + c/d = (ad + cb)/(bd); multiplication multiplies straight across; division flips the second fraction
Fraction Calculator computes add, subtract, multiply and divide fractions with automatic simplification. Formula: a/b + c/d = (ad + cb)/(bd). Example: 1/2 + 1/4: rewrite over a common denominator of 4 to get 2/4 + 1/4 = 3/4, which is already fully simplified and equals 0.
Add, subtract, multiply and divide fractions with automatic simplification. Formula: a/b + c/d = (ad + cb)/(bd); multiplication multiplies straight across; division flips the second fraction
| Field | What to enter |
|---|---|
| First fraction — whole part (optional) | 0 |
| First fraction — numerator | 1 |
| First fraction — denominator | 2 |
| Operation | Enter a value |
| Second fraction — whole part (optional) | 0 |
| Second fraction — numerator | 1 |
| Second fraction — denominator | 4 |
All fields use the exact formulas shown below — results include step-by-step breakdowns you can verify by hand.
Fractions are added or subtracted by rewriting both over a common denominator, then combining the numerators. Multiplication is simpler: multiply the numerators together and the denominators together.
Division works like multiplying by the reciprocal — flip the second fraction upside down and multiply. Every result here is simplified by dividing out the greatest common divisor, and improper fractions are also shown as mixed numbers.
Mixed numbers such as 1½ are supported: enter the whole part along with the numerator and denominator, and they are converted internally to improper fractions first.
Advertisement
AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID
1/2 + 1/4: rewrite over a common denominator of 4 to get 2/4 + 1/4 = 3/4, which is already fully simplified and equals 0.75 as a decimal.
Advertisement
AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID