Answer
2 more wins are needed
Work Step by Step
The rugby team in question 6 won 15 games last year and had a winning percentage of .833. For the team to have a winning percentage 110% better than last year, the team must have a winning percentage of $.833 *1.10$, or $.9163$.
$.9163*18 = 16.49$ wins are the goal. However, we cannot have $.49$ of a win, so we have to round to the next integer (17).
$17 - 15 = 2$
The team needs 2 more wins to meet their goal of having a winning percentage 110% better than last year.