使用SCSS/SASS计算百分比-CalculateapercentwithSCSS/SASS

I want to set a width in percentage in scss via calculation, but it gives me errors..

我想通过计算在scss中设置一个百分比的宽度，但是它给了我错误。

Invalid CSS after "...-width: (4/12)%": expected expression (e.g. 1px, bold), was ";"

无效的CSS后”……-width: (4/12)%": expected expression(例如，1px，粗体)，is ";"

I want to do something like

我想做一些类似的事情

$my_width: (4/12)%;

div{
width: $my_width;
}

how do I add the % sign in there?

如何添加%符号?

Same question with px and em

px和em也有同样的问题

2 个解决方案

$my_width: percentage(4/12);
div{
width: $my_width;
}

$my_width: 4/12*100%;

div{
width: $my_width; // 33.33333%
}