two dumps changed but difference is miniman (after 7th decimal)

dream/tests/dump/Topology14.json.result

@@ -68,8 +68,8 @@
    "results": {
     "blockage_ratio": 0.0, 
     "failure_ratio": 0.0, 
-    "waiting_ratio": 63.11458333333447, 
-    "working_ratio": 36.88541666666553
+    "waiting_ratio": 63.11458333332848, 
+    "working_ratio": 36.885416666671524
    }
   }
  ], 

dream/tests/dump/Topology63.json.result

@@ -54,9 +54,9 @@
      "ub": 0.0
     }, 
     "waiting_ratio": {
-     "avg": 5.996264565818056, 
-     "lb": 2.323682881033164, 
-     "ub": 9.668846250602947
+     "avg": 5.996264565818059, 
+     "lb": 2.323682881033165, 
+     "ub": 9.668846250602954
     }, 
     "working_ratio": {
      "avg": 94.00373543418195,