diff --git a/includes/list_subscriptions.php b/includes/list_subscriptions.php
index 697a262..feaf6d6 100644
--- a/includes/list_subscriptions.php
+++ b/includes/list_subscriptions.php
@@ -32,8 +32,8 @@
             return $price * $numberOfPaymentsPerMonth;
             break;
         case 4:
-            $numberOfPaymentsPerMonth = (0.083 / $frequency);
-            return $price * $numberOfPaymentsPerMonth;
+            $numberOfMonths = (12 * $frequency);
+            return $price / $numberOfMonths;
             break;  
         }
     }
diff --git a/stats.php b/stats.php
index 0bca08d..68047ba 100644
--- a/stats.php
+++ b/stats.php
@@ -16,13 +16,9 @@
         return $price * $numberOfPaymentsPerMonth;
         break;
     case 4:
-        if ($frequency === 1) {
-          return $price / 12;
-          break;
-        }
-        $numberOfPaymentsPerMonth = (0.0833310 / $frequency);
-        return $price * $numberOfPaymentsPerMonth;
-        break;  
+      $numberOfMonths = (12 * $frequency);
+      return $price / $numberOfMonths;
+      break;
     }
   }