diff --git a/jungmyunggi/Maximum Average Subarray i.js b/jungmyunggi/Maximum Average Subarray i.js
new file mode 100644
index 0000000..52b0967
--- /dev/null
+++ b/jungmyunggi/Maximum Average Subarray i.js	
@@ -0,0 +1,16 @@
+function findMaxAverage(nums, k) {
+    let max = -Infinity;
+    let temp = 0;
+
+    for (let i = 0; i < k; i++) {
+        temp += nums[i];
+    }
+    max = temp;
+    
+    for (let i = k; i < nums.length; i++) {
+        temp = temp - nums[i-k] + nums[i];
+        max = Math.max(max,temp)
+    }
+
+    return max/k;
+}
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