diff --git a/stix2/environment.py b/stix2/environment.py
index dee4479..2a7fcee 100644
--- a/stix2/environment.py
+++ b/stix2/environment.py
@@ -364,7 +364,7 @@ def partial_string_based(str1, str2):
 
     """
     from rapidfuzz import fuzz
-    result = fuzz.token_sort_ratio(str1, str2)
+    result = round(fuzz.token_sort_ratio(str1, str2))
     logger.debug("--\t\tpartial_string_based '%s' '%s'\tresult: '%s'", str1, str2, result)
     return result / 100.0