diff --git a/baekjoon/4344.js b/baekjoon/4344.js
new file mode 100644
index 0000000..070c7e1
--- /dev/null
+++ b/baekjoon/4344.js
@@ -0,0 +1,19 @@
+// 평균은 넘겠지 : 수학
+const input = require("fs")
+  .readFileSync("/dev/stdin")
+  .toString()
+  .trim()
+  .split("\n")
+  .map((v) => v.split(" ").map((v) => Number(v)));
+const [caseNum] = input.shift();
+const testCases = input;
+const answer = [];
+
+for (const [studentNum, ...scores] of testCases) {
+  const total = scores.reduce((acc, curr) => acc + curr, 0);
+  const avg = total / studentNum;
+  const overAvg = scores.filter((v) => v > avg).length;
+  answer.push(Math.round((overAvg / studentNum) * 100 * 1000));
+}
+
+console.log(answer.map((v) => `${v / 1000}%`).join("\n"));