The average number of starfruits in Box K, Box L and Box M is 44 and it is 8 more than the average number of oranges in the 3 boxes. ¹₉ of the oranges are in Box K and the oranges in Box K is 40% of the number of oranges in Box L. If each box has the same number of fruits, what percentage of the fruits in Box M are starfruits?
Average number of oranges
= 44 - 8
= 36

Total number of oranges
= 3 x 36
= 108

Total number of starfruits
= 3 x 44 
= 132

Total number of fruits
= 108 + 132
= 240

Number of fruits in each box
= 240 ÷ 3
= 80

Oranges in Box K	Oranges in Box L	Oranges in Box M	Total oranges
1x2	8x2		9x2
2x1	5x1
2 u	5 u	11 u	18 u

40% = ⁴⁰₁₀₀ = ²₅

The number of oranges in Box K is repeated.  Make the number of oranges in Box K the same.  LCM of 1 and 2 is 2. 

Total number of oranges
= 2 u + 5 u + 11 u
= 18 u

18 u = 108

1 u = 108 ÷ 18 = 6

Number of oranges in Box M
= 11 u
= 11 x 6
= 66

Number of starfruits in Box M
= 80 - 66
= 14

Percentage of the fruits in Box M are starfruits
= ¹⁴₈₀ x 100%
= 17.5%

Answer(s): 17.5%