config.json in trackler-2.2.1.134

- old
+ new

@@ -134,9 +134,19 @@
       ],
       "unlocked_by": "sum-of-multiples",
       "uuid": "8150604d-4cdc-414a-a523-dd65ac536f0e"
     },
     {
+      "core": false,
+      "difficulty": 4,
+      "slug": "rational-numbers",
+      "topics": [
+        "mathematics"
+      ],
+      "unlocked_by": "leap",
+      "uuid": "9ae7f7ed-75d8-4d03-967c-53846634ae07"
+    },
+    {
       "core": true,
       "difficulty": 3,
       "slug": "kindergarten-garden",
       "topics": [
         "enumerations",
\ No newline at end of file