Calculate change percentage based on a number input from responses

Question

I am working on a design for a question where a participant will type a number in the textbox. Then, a percentage number “(Input_number-210)/210” will appear below the text box. The following is the basic question:The current price is $210.What price do you want to offer?(After you type the number, the change percentage will appear below. ) The following is theJavascript I tried. It shows nothing. Three things that I am not sure:(1) Can we show the percentage after there is a number in the input box, within the same page, even the some block?(2) There are a few function in the Javascript box. I am not sure which one to choose, or more than one needed?(3) How to let the percentage number show right below the input box?I would really appreciate your help! Thank you so much! Qualtrics.SurveyEngine.addOnload(function(){ function calc(){ var disc = 0;var cp =getVal(parseInt($jq('input[type="number"]').eq(0).val()));if (cp>0){change_p = Math.round(((cp - 210)/210)*100,2);}return change_p; };});

rondev · Answer

Hi @data_researcher_BYou need to use on input method to call calc() function and then change the value of a tag value using JS.

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