如何将数字转换为百分比 [英] How to convert number to percentage

问题描述

如何在文本框中将数字转换为40到0.4

How to convert number like 40 to 0.4 in a textbox

推荐答案

将数字除以100.



这有什么难的？

Divide the number by 100.

What's so hard about this?

只需将文本框中的数字解析为double并将其除以100：

Just parse the number in the textbox to a double and divide it by 100:

Dim value As String = textBox1.Text
Dim num As Double
If Double.TryParse(value, num) Then
    Dim percentage As Double = num / 100
    textBox2.Text = percentage.ToString()
Else
    ' cannot parse the given string to a double
End If

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