Since 17 is the total from last year, that was the MOST you had so far. So 17 can be thought of as 100%
Therefore, (29/17) = (x/100).
(2900/17) = x
x = 170 %
This makes sense since, half of 17 is 8.5, which means 17 + 8.5 = 25.5. And that would be 150%. So 29 should be of a higher % than 25.5.
* Answer should show only 2 significant figures....