diff --git a/show/dance2013/song11.n3 b/show/dance2013/song11.n3
--- a/show/dance2013/song11.n3
+++ b/show/dance2013/song11.n3
@@ -21,7 +21,7 @@
 
 <http://light9.bigasterisk.com/show/dance2013/song11/subterm/1> a ns1:Subterm ;
     rdfs:label "" ;
-    ns1:expression "chase1(t)*chase(t, names=backchase,ontime=60/116/2,offset=0.0)" .
+    ns1:expression "chase1(t)*chase(t, names=backchase,ontime=60./116/2,offset=0.0)" .
 
 <http://light9.bigasterisk.com/show/dance2013/song11/subterm/2> a ns1:Subterm ;
     rdfs:label "center" ;