Divide the distances of the satellites by the distance to the nearest star....
then satellite A will be something like 1 /30 th or .765 the distance of the nearest star (examples)
...after you get the decimal comparison of how far they are compared to the nearest star (.765 in my example) multiply by 100% to get the percentage.... 76.5 % of the way to the star etc
or more likely , you will find something like .0000765 of the distance to the star.... x 100 = .00765 % or 7.65 x 10-3 % in scientific notation