％ 百分数转小数Percent to Decimal

使用说明与常见问题How-to & FAQ

「百分数转小数」是什么？What is the Percent to Decimal tool?

小数 = 百分数 ÷ 100。本地处理。可设置「百分数 %」。Decimal = percent ÷ 100. Processed locally. Settings: Percent %.

如何使用「百分数转小数」？How do I use the Percent to Decimal tool?

在「百分数转小数」中，填写「百分数 %」等参数，结果会随输入实时计算并显示在下方。In the Percent to Decimal: Fill in "Percent %"; results are recalculated instantly as you type.

怎么反过来换算？How do I convert back?

小数乘以 100 就是百分数，例如 0.375 = 37.5%。本页方向是 百分数 ÷ 100 = 小数，例如 12.5% = 0.125。Multiply a decimal by 100 to get a percent: 0.375 = 37.5%. This page goes the other way: percent ÷ 100 = decimal, so 12.5% = 0.125.

能举个计算实例吗？Can you show a worked example?

例如在「百分数转小数」中填 百分数 % = 12.5，结果区显示：小数：0.125；分数示意：12.5/100For example, entering Percent % = 12.5 in the Percent to Decimal gives: Decimal: 0.125; Fraction demo: 12.5/100

哪些输入会被检查？Which inputs are validated?

「百分数转小数」会检查这些输入——「百分数 %」：必须填写；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Percent to Decimal checks its inputs — "Percent %": required; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「百分数转小数」的设置：「百分数 %」默认 12.5。每次生成结果都按当前设置处理。Settings in the Percent to Decimal — "Percent %" default 12.5. The result always uses the current settings.

计算精度如何？How precise are the results?

「百分数转小数」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Percent to Decimal uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.

「百分数转小数」免费吗？需要注册吗？Is the Percent to Decimal free? Do I need an account?

「百分数转小数」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Percent to Decimal is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.