diff --git a/docs/guide/styles.md b/docs/guide/styles.md
index 96e6253bd..e31b9b49c 100644
--- a/docs/guide/styles.md
+++ b/docs/guide/styles.md
@@ -186,7 +186,7 @@ With the width set to `"50%"` and the height set to `"80%"`, the widget will kee
 
 Percentage units are useful for widgets that occupy a relative portion of the screen, but they can be problematic for some proportions. For instance, if we want to divide the screen into thirds, we would have to set a dimension to `33.3333333333%` which is awkward. Textual supports `fr` units which are often better than percentage-based units for these situations.
 
-When specifying `fr` units for a given dimensions, Textual will divide the available space by the total `fr` units on a dimension. That space will then be divided amongst the widgets as a proportion of their individual `fr` value.
+When specifying `fr` units for a given dimension, Textual will divide the available space by the sum of the `fr` units on that dimension. That space will then be divided amongst the widgets as a proportion of their individual `fr` values.
 
 Let's look at an example. We will create two widgets, one with a height of `"2fr"` and one with a height of `"1fr"`.