How to add a "%" to all values in d3.js?

@jerad 

To add a "%" symbol to all values in D3.js, you can use the .append() method to add the "%" symbol to the text content of the values. Here's an example code snippet:

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// Select all elements with class 'value'
d3.selectAll('.value')
  .text(function(d) {
    return d + '%';  // Append '%' to the value
  });

In this example, we first select all elements with the class name "value" using the d3.selectAll() method. Then we use the .text() method to update the text content of each selected element by adding a "%" symbol to the original value with the + '%'.

Make sure to adjust the selector ('.value') and the logic to match your specific scenario.