The average number of chikoos in Box P, Box Q and Box R is 39 and it is 3 more than the average number of starfruits in the 3 boxes. ¹₆ of the starfruits are in Box P and the starfruits in Box P is 30% of the number of starfruits in Box Q. If each box has the same number of fruits, what percentage of the fruits in Box R are chikoos?
Average number of starfruits
= 39 - 3
= 36

Total number of starfruits
= 3 x 36
= 108

Total number of chikoos
= 3 x 39 
= 117

Total number of fruits
= 108 + 117
= 225

Number of fruits in each box
= 225 ÷ 3
= 75

Starfruits in Box P	Starfruits in Box Q	Starfruits in Box R	Total starfruits
1x3	5x3		6x3
3x1	10x1
3 u	10 u	5 u	18 u

30% = ³⁰₁₀₀ = ³₁₀

The number of starfruits in Box P is repeated.  Make the number of starfruits in Box P the same.  LCM of 1 and 3 is 3. 

Total number of starfruits
= 3 u + 10 u + 5 u
= 18 u

18 u = 108

1 u = 108 ÷ 18 = 6

Number of starfruits in Box R
= 5 u
= 5 x 6
= 30

Number of chikoos in Box R
= 75 - 30
= 45

Percentage of the fruits in Box R are chikoos
= ⁴⁵₇₅ x 100%
= 60%

Answer(s): 60%