How to create a macro to roll a skill check under n times this skill?

Hello, I tried to define a macro like the following /em Roll one d100 against skillx5 [[1d100<@{skill}*5]] in order to roll one d100 and check if the result is below (skill x 5) but it doesn't work. How can I achieve such a macro? Regards.

I haven't tested it to see if it works, but you might try: [[1d100<[[@{skill}*5]]]]

Waouh!!! Great! Thank you for your quick and efficient answer: this works like a charm!

And here is a way to improve your great macro by providing a way to choice the multiplicator to apply to the formula: [[1d100<[[@{skill} [[?{mul|2,2|3,3|5,5}]] ]]]] Powerful!!

Using the macro below, is there a way to display into the chat window the input value selected for "Multiplicateur" as well as the roll result? /em CON|Brook [[1d100<[[@{Henry Brook|CON} * [[?{Multiplicateur|2,2|3,3|4,4|5,5|6,6}]]  ]]]]

If you use the exact same query more than once in a macro, it will copy the answer that was given to the first and automatically apply it to any other instances of that query.  It will only ask the query once.  I think you could do something like this: /em CON|Brook [[1d100<[[@{Henry Brook|CON} * [[?{Multiplicateur|2,2|3,3|4,4|5,5|6,6}]]  ]]]] the Multiplicateur used was [[?{Multiplicateur}]]. That should leave the answer you chose in the query highlighted in yellow like a roll.  It should still work without the double square brackets, which would leave it a plain number without being highlighted.

Amazing!! Thank you very much, that's exactly the result I was looking for.