Solution

Doughnut percents luke

First name
Luke
School
Home ed
Country
Age
10

I noticed that there was only one way to match something to 1/5 which was 20% so this was a good place to start that doughnut. Sometimes something matched up but there wasn't a match on another domino within the same doughnut so I had to choose between two dominoes (e.g. 0.6 could match to 3/5 and also 66 2/3 %.
Whether I made 4 domino, 8, domino or 16 domino doughnuts, the same rule applied.