diff --git a/libraries/deno-commons-mod.ts b/libraries/deno-commons-mod.ts
index 5d056b1..a481d20 100644
--- a/libraries/deno-commons-mod.ts
+++ b/libraries/deno-commons-mod.ts
@@ -1,7 +1,7 @@
 // Reference:
 // - https://docs.deno.com/runtime/fundamentals/testing/
 
-import { assertEquals } from "jsr:@std/assert";
+import {assertEquals} from "jsr:@std/assert";
 
 export function compareVersion(ver1: string, ver2: string): 0 | 1 | -1 {
     if (ver1 === ver2) return 0;
@@ -91,20 +91,37 @@ export function formatSize(size: number): string {
     return sizes.reverse().join(" ");
 }
 
+export function formatSize2(size: number): string {
+    if (size < 0) {
+        return "N/A";
+    }
+    if (size < 1024) {
+        return `${size}B`;
+    }
+    if (size < 1024 * 1024) {
+        return `${formatNumber(size / 1024)}KiB`;
+    }
+    return `${formatNumber(size / (1024 * 1024))}MiB`;
+}
+
 export function formatPercent(a: number, b: number): string {
     if (b == null || b <= 0) {
         return "N/A";
     }
-    const p = ((a * 100) / b).toString();
+    return formatNumber((a * 100) / b) + "%";
+}
+
+export function formatNumber(num: number): string {
+    const p = num.toString();
     const pointIndex = p.indexOf(".");
     if (pointIndex < 0) {
-        return p + ".00%";
+        return p + ".00";
     }
     const decimal = p.substring(pointIndex + 1);
     const decimalPart = decimal.length == 1
         ? (decimal + "0")
         : decimal.substring(0, 2);
-    return p.substring(0, pointIndex) + "." + decimalPart + "%";
+    return p.substring(0, pointIndex) + "." + decimalPart;
 }
 
 export async function clearLastLine() {
@@ -156,6 +173,15 @@ Deno.test("formatSize", () => {
     );
 });
 
+Deno.test("formatSize2", () => {
+    assertEquals("N/A", formatSize2(-1));
+    assertEquals("0B", formatSize2(0));
+    assertEquals("1B", formatSize2(1));
+    assertEquals("1.00KiB", formatSize2(1024));
+    assertEquals("10.00KiB", formatSize2(1024 * 10));
+    assertEquals("1.00MiB", formatSize2(1024 * 1024));
+});
+
 Deno.test("formatPercent", () => {
     assertEquals("N/A", formatPercent(100, -1));
     assertEquals("N/A", formatPercent(100, 0));