Question

Dev gets 10% of votes Joe gets twice as many votes holly what percentage of the votes does the winer get?

Answer 1

Inferring that they are the only three players, all of their votes equal to 100%. If Dev gets 10%, that leaves 90% for Joe & Holly. You are now looking for a number that , when doubled adds to 90%.
Using an equation: a+2a=90
Solve for a.
3a=90 a=90/3

Now we have 10%,30%, & 60%