diff --git "a/BOJ/Java/src/B2/Boj_9070_\354\236\245\353\263\264\352\270\260.java" "b/BOJ/Java/src/B2/Boj_9070_\354\236\245\353\263\264\352\270\260.java"
new file mode 100644
index 00000000..e0c2ccd8
--- /dev/null
+++ "b/BOJ/Java/src/B2/Boj_9070_\354\236\245\353\263\264\352\270\260.java"
@@ -0,0 +1,39 @@
+package B2;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.util.StringTokenizer;
+
+public class Boj_9070_장보기 {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        StringBuilder sb = new StringBuilder();
+
+        int T = Integer.parseInt(br.readLine());
+        for (int t = 0; t < T; t++) {
+            int N = Integer.parseInt(br.readLine());
+            int cost = 0;
+            double WpC = 0.0;
+
+            for (int i = 0; i < N; i++) {
+                StringTokenizer st = new StringTokenizer(br.readLine());
+                double W = Double.parseDouble(st.nextToken());
+                double C = Double.parseDouble(st.nextToken());
+
+                if (WpC < W / C || (WpC == W / C && cost > C)) {
+                    WpC = W / C;
+                    cost = (int) C;
+                }
+            }
+
+            sb.append(cost).append('\n');
+        }
+
+        bw.write(sb.toString());
+        bw.flush();
+    }
+}