diff --git a/core/models.py b/core/models.py
index bc684a35..a46896ba 100644
--- a/core/models.py
+++ b/core/models.py
@@ -98,6 +98,10 @@ class Meta:
     def periods(self) -> list[float]:
         return [getattr(self, month) for month in MONTHS]
 
+    @property
+    def periods_as_percentage(self) -> list[float]:
+        return [month * 100 for month in self.periods]
+
     financial_year = models.ForeignKey(FinancialYear, on_delete=models.PROTECT)
     apr = models.FloatField(default=1.0)
     may = models.FloatField(default=1.0)
diff --git a/payroll/views.py b/payroll/views.py
index 44c61d7f..42e3baf0 100644
--- a/payroll/views.py
+++ b/payroll/views.py
@@ -15,7 +15,7 @@
 from .services import payroll as payroll_service
 
 
-class PositionView(UserPassesTestMixin, View):
+class EditPayrollView(UserPassesTestMixin, View):
     def test_func(self) -> bool | None:
         return self.request.user.is_superuser
 
@@ -49,7 +49,7 @@ def post(self, request, *args, **kwargs):
 
 
 # TODO: check user has access to cost centre
-class PayrollView(PositionView):
+class PayrollView(EditPayrollView):
     def get_data(self):
         return payroll_service.get_payroll_data(
             self.cost_centre,
@@ -64,7 +64,7 @@ def post_data(self, data):
         )
 
 
-class VacancyView(PositionView):
+class VacancyView(EditPayrollView):
     def get_data(self):
         return payroll_service.get_vacancies_data(
             self.cost_centre,
@@ -79,7 +79,7 @@ def post_data(self, data):
         )
 
 
-class PayModifierView(PositionView):
+class PayModifierView(EditPayrollView):
     def get_data(self):
         return payroll_service.get_pay_modifiers_data(
             self.cost_centre,