百分比計算器

計算一個數的百分之幾、一個數佔另一個數的百分比以及百分比變化。

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使用方法

  1. 1
    選擇設定

    填寫資訊或選擇您需要的選項。

  2. 2
    檢視結果

    更改任何內容時,預覽會立即更新。

  3. 3
    下載或儲存

    將結果儲存到您的裝置。不會向伺服器傳送或儲存任何內容。

About this tool

Quickly work out discounts, tips, marks and growth. Find a percentage of a number, find what percent one number is of another, or find the percentage change between two numbers. The answers update as you type.

When to use it

Work out a percentage of a number, what percent one number is of another and percentage change, for discounts, marks, tax and growth.

Tips

For increases use new minus old, divided by old. A fall of 50 percent needs a 100 percent rise to recover.

Privacy

Everything runs in your browser, so your data is not uploaded or stored.

獲得最佳結果的提示

開始之前請花一點時間閱讀選項,並先用一個小例子試用工具。一切都在您裝置的瀏覽器中執行;您輸入或新增的任何內容都不會被上傳,關閉標籤頁會清除所有內容。如果看起來不對,請重新整理頁面重試,或使用本頁的報告連結告訴我們出了什麼問題。如果結果仍然看起來不對,請每次只更改一個值,看看哪個輸入影響最大。如果您還會再用,請收藏此頁。

要點

常見問題

How do I work out a discount?

Use the first box: for 20% off 150, type 20 and 150 to get 30, then subtract it from the price.

How is percentage change worked out?

It is the new value minus the old value, divided by the old value, times 100.

How do I find 15 percent of a number?

Multiply the number by 0.15.

What is percentage change?

The difference divided by the original value, times 100.

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