A useful report lets us repeat the problem without asking for private data. Note the page path, the numbers or expression you used, the result you got and the result you expected. If it is an access barrier, describe the control, the browser and the assistive technology. Share only the part of the input you are happy to send.
Check before reporting
For 1/2 + 1/3, the exact result is 5/6; 0.8333 is an approximation, not another fraction. For a division, check that the divisor is not zero. If the result looks wrong, find the first step that differs from your method and keep the problem’s units.
How reports are handled
Send the case to editorial@calculadorafracciones.com. To review an error, the calculation is reproduced first; then the page is fixed and the affected examples and explanations are checked. The editorial lead is Dr Elena Vargas Moreno. Do not send student names or private documents.
Corrections log
These are the corrections included in the current version of the site.
| Page | What was corrected |
|---|---|
| Algebraic fractions | The expressions 2*x and x*(x+1) lost the asterisk and part of the text came out in italics. They now display as typed. |
| Fraction of an hour to minutes | The introduction contrasted 90 min with “1 h 5 min”, a duration that made no sense in that example. The page now explains that 1.5 h is 1 h 30 min, not 1 h 50 min. |
| Subtracting fractions | The “Common mistake” box showed “1/2 + 1/3 = 2/5”, an addition error, on the subtraction page. It now shows a subtraction error: 5/6 − 1/3 is not 4/3 but 1/2. |
| Fraction blog | The summary of two articles said a number with “infinite decimals” cannot be a fraction (repeating decimals can) and that a year lasts 365 1/4 days. It now says the decimals never end and never repeat, and that a year lasts about 365.2422 days, with 1/4 (Julian) and 97/400 (Gregorian). |
| Fractions that approximate pi | The text said you had to jump to 103993/33102 to improve on 355/113 and left out 52163/16604, which beats it by a hair. It now says so. |
| Why fractions are hard | It said that dividing a positive number by a fraction less than 1 “can” make it larger. For positive numbers it always does. |
| The 17 camels puzzle | The reference link led to an article about a different version of the tale. It now points to a history-of-mathematics study of the 17-camel story. |
| Eleventh or one eleventh? | The article mixed in Spanish asides about “onceavo” and “tercio”. They are removed and the page now covers English only. |
| Proper and improper fractions (worksheets) | The explanation said a fraction is improper only when the numerator is larger than the denominator. It now says larger than or equal to, as in the types-of-fractions guide, so 4/4 is improper. |
| Number line and fraction of a quantity worksheets | The descriptions of several worksheets read “problems on exercises”. They now read “problems on placing and reading…” and “problems on finding the part…”. |
| Typing fractions in Word and Docs | The Google Docs menu path for special characters was given in two versions. It now reads Insert > Symbols > Special characters, checked against Google’s help page. |
| Typing fractions in Word and Docs (count) | The count of fractions with their own Unicode character said 18. It now says 19, including ↉ (U+2189). |
When a correction is noted
Any change after publication to a figure, formula, result, statement of a rule, source or curriculum reference is noted. Typos and layout adjustments are not.