// ----
// libsass (v3.2.5)
// ----

$font-size1: 12;
$font-size2: 24;

@mixin line-height($lh){
  line-height: ($lh/10) +px;
  line-height: ($lh*1.5) +rem;
}

@mixin font-size($size){
  @include line-height($size);
  font-size: $size+px;
  font-size: $size+rem;
}



.test {
  @include font-size($font-size2);
}

.bob {
  @include font-size($font-size1);
}