diff --git a/api/api_v1/endpoints/query.py b/api/api_v1/endpoints/query.py
index 87ba0a0..31cc298 100644
--- a/api/api_v1/endpoints/query.py
+++ b/api/api_v1/endpoints/query.py
@@ -174,7 +174,7 @@ async def retention_model(
             tmp.setdefault('d0', len(a))
             tmp.setdefault('p', []).append(division(len(a & b) * 100, len(a)))
             tmp.setdefault('n', []).append(len(a & b))
-            tmp.setdefault('p_outflow', []).append(100 - division(len(a & b) * 100, len(a)))
+            tmp.setdefault('p_outflow', []).append(round(100 - division(len(a & b) * 100, len(a)), 2))
             tmp.setdefault('n_outflow', []).append(len(a) - len(a & b))
     groups = set([tuple(i) for i in df[res['groupby']].values])
     df.set_index(res['groupby'], inplace=True)