diff --git a/qutebrowser/config/configtypes.py b/qutebrowser/config/configtypes.py
index 6c21c1407..ab19a1cb3 100644
--- a/qutebrowser/config/configtypes.py
+++ b/qutebrowser/config/configtypes.py
@@ -632,21 +632,22 @@ class Float(_Numeric):
 
 class Perc(_Numeric):
 
-    """A percentage, as a string ending with %."""
+    """A percentage."""
 
     def to_py(self, value):
-        self._basic_py_validation(value, str)
+        self._basic_py_validation(value, (float, int, str))
         if not value:
             return None
 
-        if not value.endswith('%'):
-            raise configexc.ValidationError(value, "does not end with %")
-        try:
-            floatval = float(value[:-1])
-        except ValueError:
-            raise configexc.ValidationError(value, "must be a percentage!")
-        self._validate_bounds(floatval, suffix='%')
-        return floatval
+        if isinstance(value, str):
+            value = value.rstrip('%')
+            try:
+                value = float(value)
+            except ValueError:
+                raise configexc.ValidationError(
+                    value, "must be a valid number!")
+        self._validate_bounds(value, suffix='%')
+        return value
 
     def to_str(self, value):
         if value is None:
diff --git a/tests/unit/config/test_configtypes.py b/tests/unit/config/test_configtypes.py
index 8ce7845dc..30af8d6ea 100644
--- a/tests/unit/config/test_configtypes.py
+++ b/tests/unit/config/test_configtypes.py
@@ -884,19 +884,20 @@ class TestPerc:
 
     @pytest.mark.parametrize('kwargs, val', [
         ({}, '1337%'),
+        ({}, '1337'),
         ({}, '1337.42%'),
+        ({}, '1337.42'),
         ({'maxval': 2}, '2%'),
     ])
     def test_from_str_valid(self, klass, kwargs, val):
         assert klass(**kwargs).from_str(val) == val
 
     @pytest.mark.parametrize('kwargs, val', [
-        ({}, '1337'),
-        ({}, '1337%%'),
         ({}, 'foobar'),
         ({}, 'foobar%'),
         ({'minval': 2}, '1%'),
         ({'maxval': 2}, '3%'),
+        ({'maxval': 2}, '3'),
         ({'minval': 2, 'maxval': 3}, '1%'),
         ({'minval': 2, 'maxval': 3}, '4%'),
     ])
@@ -906,6 +907,9 @@ class TestPerc:
 
     @pytest.mark.parametrize('kwargs, val, expected', [
         ({}, '1337.42%', 1337.42),
+        ({}, '1337.42', 1337.42),
+        ({}, 23, 23),
+        ({}, 23.42, 23.42),
         ({'minval': 2}, '2.01%', 2.01),
     ])
     def test_to_py_valid(self, klass, kwargs, val, expected):
@@ -913,8 +917,8 @@ class TestPerc:
 
     @pytest.mark.parametrize('kwargs, val', [
         ({}, 'foobar'),
-        ({}, 23),
         ({'minval': 2, 'maxval': 3}, '1.99%'),
+        ({'minval': 2, 'maxval': 3}, '1.99'),
     ])
     def test_to_py_invalid(self, klass, kwargs, val):
         with pytest.raises(configexc.ValidationError):