diff --git a/manual.pdf b/manual.pdf
index f59e9b0..417367f 100644
Binary files a/manual.pdf and b/manual.pdf differ
diff --git a/src/charts/bar/stacked.typ b/src/charts/bar/stacked.typ
index e408683..aba1569 100644
--- a/src/charts/bar/stacked.typ
+++ b/src/charts/bar/stacked.typ
@@ -160,5 +160,7 @@
   bar-width: bar-width,
   bar-style: bar-style,
   axes: axes,
+  y-tick-step: 0.2,
+  y-format: (it)=>{$#{it*100}%$},
   ..plot-args
 )
\ No newline at end of file
diff --git a/tests/charts/bar/stacked100/ref/1.png b/tests/charts/bar/stacked100/ref/1.png
index a8b6a29..65454d5 100644
Binary files a/tests/charts/bar/stacked100/ref/1.png and b/tests/charts/bar/stacked100/ref/1.png differ