This is a bit off topic, but what's a better way to represent fractional data than a pie chart? I'd say bar chart, but that doesn't immediately show that the data sums to 1.
While a pie chart may be the best way to represent fractional data, a pie chart with 10 segments and four shades of grey is not. A better method would have been to include only significant results, coupled with an "Other" category, in the chart. A separate data table could then inform those interested in delving deeper into the results.
Well, pie charts aren't a very good way to represent fractional data because humans aren't great at judging angles.