diff --git a/app/Service/Api/Order/ConfirmationOrderService.php b/app/Service/Api/Order/ConfirmationOrderService.php
index 3046102..366b1fc 100644
--- a/app/Service/Api/Order/ConfirmationOrderService.php
+++ b/app/Service/Api/Order/ConfirmationOrderService.php
@@ -42,6 +42,9 @@ class ConfirmationOrderService extends BaseOrderService
         return $this->return->success('success',$this->orderRes);
     }
 
+    /**
+     * @return void
+     */
     private function autoSelectCoupon(): void
     {
         if ($this->couponId != 0) return;
@@ -56,7 +59,7 @@ class ConfirmationOrderService extends BaseOrderService
         $maxValidityEndTimeDate = max(array_column($noUseCoupon,'validity_end_time'));
 
         $filtered = array_filter($noUseCoupon, function($item) use($maxValidityEndTimeDate) {
-            return $item['validity_end_time'] === $maxValidityEndTimeDate;
+            return $item['validity_end_time'] == $maxValidityEndTimeDate;
         });
 
         $selectMaxPrice = 0;
@@ -64,7 +67,7 @@ class ConfirmationOrderService extends BaseOrderService
         foreach ($filtered as &$value) {
             $value['amount'] = match ($value['coupon_type']) {
                 CouponCode::COUPON_TYPE_INSTANT_REDUCTION => $value['amount'],
-                CouponCode::COUPON_TYPE_DISCOUNT => $value['amount'] * $orderMaxPrice,
+                CouponCode::COUPON_TYPE_DISCOUNT => $value['ratio'] * $orderMaxPrice,
                 default => 0
             };