Answer
It is clear that out of the two cromatography procedures the one on the right was more successful. To quantify this, measure the distance each spot has travelled and see how the measured distances compare.
Work Step by Step
The one on the right is more successful because there is actual separation of dyes in that one. When the word quantify is being used, the first instinct should be to find a way to measure something. When talking about paper chromatography, distance traveled is the only logical choice.
