Kerning of Fractions

Is there any way of adjusting the kerning of fractions?
It appears that the numerator and denominator are right aligned rather than centered.

Hi Miano - it doesn’t look right-aligned for something like 1/16 and it also looks to depend a lot on the font:

Changed font to Calibri:

But, anyway, I put on the heap as RH-56856 and perhaps there’s something that can be done about this.
-wim