Internal font-size increase and decrease "shorthand"

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There are certain situations where I'd like to have some text in the same field that is slightly smaller or larger than the other. An example would be a grid column entry where both a number and the percentage that number represents are listed - the percentage is a valuable number to show the user, but it is not as important as the actual number, and I want to make it clear that it should be displayed at a diminished size. Another example (also in the grid) would be where one column contains values that are even more important than the values in most of the other columns and so I want to make it clear that it should be displayed at a larger size. Example:



What I'd like to see is some kind of "shorthand" option, like asterisk for bold and underscore for italic, that would increase or decrease the font-size of the surrounded text by a specified number of "steps" of the font size list.

For example, something like the escape slash used for newline followed by a positive or negative number to indicate the steps. So <strong>text</strong> would increase the font size by one step and <strong>\-2text\-2 would decrease it by two steps.

Or maybe use slash+circumflex to go up one step:
<strong>\^text\^</strong>
And slash+v to go down one step:
<strong>\vtext\v</strong>
with multiple circumflexes/v's to go up or down more than one step:
Up Two:
<strong>\^^text\^^</strong>
Down Three
<strong>\vvvtext\vvv</strong>

To start the internal string with a circumflex or a v, insert a slash to escape:
Increase Font-Size of the word "very":
<strong>\vv\very\vv</strong>

:-j(enni)