diff --git a/src/locales/en.json b/src/locales/en.json
index 3aad61d2..14d25b39 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -257,6 +257,7 @@
       "subtitle": "Global average pity from paimon.moe users submission",
       "update": "Updated",
       "summoned": "Summoned",
+      "wonFiftyFifty": "won 50:50",
       "fromFiveStar": "from all 5★",
       "fromFourStar": "from all 4★",
       "show": "Show",
diff --git a/src/locales/id.json b/src/locales/id.json
index 089cb6d5..789a71f3 100644
--- a/src/locales/id.json
+++ b/src/locales/id.json
@@ -257,6 +257,7 @@
       "subtitle": "Rata-rata pity dari kiriman pengguna paimon.moe",
       "update": "Diupdate",
       "summoned": "Pulang",
+      "wonFiftyFifty": "menang 50:50",
       "fromFiveStar": "dari semua 5★",
       "fromFourStar": "dari semua 4★",
       "show": "Tampilkan",
diff --git a/src/routes/wish/tally/_item.svelte b/src/routes/wish/tally/_item.svelte
index a6de49dc..7d8f7269 100644
--- a/src/routes/wish/tally/_item.svelte
+++ b/src/routes/wish/tally/_item.svelte
@@ -134,6 +134,7 @@
         if (item) {
           featuredValues[i] = {
             total: item.count,
+            guaranteed: item.guaranteed,
             percentage:
               (item.count /
                 (type === 'character' && id !== 200001 && i === 1 ? data.total.rare : data.total.legendary)) *
@@ -309,9 +310,18 @@
                       <span class="text-gray-400">{$t('wish.tally.summoned')}</span>
                     </p>
                     <p class="text-gray-400">
-                      {numberFormat.format(featuredValues[i].percentage)}% {$t(
-                        type === 'character' && i === 1 ? 'wish.tally.fromFourStar' : 'wish.tally.fromFiveStar',
-                      )}
+                      {#if id === 300011 && i === 0}
+                        {numberFormat.format(
+                          ((featuredValues[i].total - featuredValues[i].guaranteed) /
+                            (data.total.legendary - featuredValues[i].guaranteed)) *
+                            100,
+                        )}%
+                        {$t('wish.tally.wonFiftyFifty')}
+                      {:else}
+                        {numberFormat.format(featuredValues[i].percentage)}% {$t(
+                          type === 'character' && i === 1 ? 'wish.tally.fromFourStar' : 'wish.tally.fromFiveStar',
+                        )}
+                      {/if}
                     </p>
                   </td>
                 </tr>