Generated by SassMeister.com.

SassMeister-input.sass

// ----
// Sass (v3.3.0.rc.4)
// Compass (v1.0.0.alpha.18)
// ----

$base-font-size: 12px
$base-line-height: 9px // 1.5 times the base font size

@function strip-unit($value) 
  @return $value / ($value * 0 + 1)

@mixin adjust-font-size-too($font-size, $line-height: 1px)
  font-size: $font-size 
  font-size: $font-size / $base-font-size +rem
  line-height: strip-unit($line-height / $base-line-height)
  
.line-new-22
  +adjust-font-size-too(22px, 22px)

SassMeister-output.css

.line-new-22 {
  font-size: 22px;
  font-size: 1.83333rem;
  line-height: 2.44444;
}