Please help us help you and fill where relevant:
Your LimeSurvey version: [see right hand bottom of your LimeSurvey admin screen]
Own server or LimeSurvey hosting:
Survey theme/template:
==================
Hi there,

Is there a way to have a maximum sum value over 2 separate questions?

The first question is a numerical input & asks the percentage of main milk brand usage (Milk 1), the next question is a multiple numerical input and asks the percentage of other milk brand usage (Milk 2, Milk 3 etc.).
How can I get the total usage percentage to not exceed 100%? So if in Q1 Milk 1 = 60%, in Q2 Milk 2 + Milk 3 should be forced to sum to 40% (Q2 should be 100%-Q1)

Thanks

On Q2 : {sum(Q1.NAOK,Q2.NAOK) < le 100}

www.limesurvey.org/manual/Question_type_...28em_validation_q.29

If Q2 is a multi-numeric, I think its validation equation should be:


Or:

Why not putting all milk brands into 1 multiple numerical question? For sure would be a lot more userfriendly for the respondent to fill and you can show how much they have already distributed from the 100%.

1. Main milk brand
2. Second brand
3. Third brand...

tpartner wrote:

If Q2 is a multi-numeric, I think its validation equation should be:

 

Yes ! You're right !