Write to editorial@calculadorafracciones.com with questions about the explanations, suggestions or errors. We reply by email. If you want to report an error, the corrections page explains which details help reproduce it and lists the corrections already made.
You can open a message with the subject already written in your email app. This page does not send messages by itself.
Describing a math question
Note the tool page, the numbers you entered and the result you expected. For example: “in fraction addition, 1/2 + 1/3 should give 5/6.” Say whether the problem appeared while typing, calculating, copying or reading the steps. There is no need to send student names, documents, screenshots with personal data or account information.
The calculator fields are for numbers and expressions; do not enter personal data in them.
Who answers
The site is run by Dr Elena Vargas Moreno, whose identification details are in the legal notice. You can work through the case with the fraction calculator before writing.