The average number of starfruits in Container A, Container B and Container C is 78 and it is 6 more than the average number of mangoes in the 3 containers. ¹₆ of the mangoes are in Container A and the mangoes in Container A is 80% of the number of mangoes in Container B. If each container has the same number of fruits, what percentage of the fruits in Container C are starfruits?
Average number of mangoes
= 78 - 6
= 72

Total number of mangoes
= 3 x 72
= 216

Total number of starfruits
= 3 x 78 
= 234

Total number of fruits
= 216 + 234
= 450

Number of fruits in each container
= 450 ÷ 3
= 150

Mangoes in Container A	Mangoes in Container B	Mangoes in Container C	Total mangoes
1x4	5x4		6x4
4x1	5x1
4 u	5 u	15 u	24 u

80% = ⁸⁰₁₀₀ = ⁴₅

The number of mangoes in Container A is repeated.  Make the number of mangoes in Container A the same.  LCM of 1 and 4 is 4. 

Total number of mangoes
= 4 u + 5 u + 15 u
= 24 u

24 u = 216

1 u = 216 ÷ 24 = 9

Number of mangoes in Container C
= 15 u
= 15 x 9
= 135

Number of starfruits in Container C
= 150 - 135
= 15

Percentage of the fruits in Container C are starfruits
= ¹⁵₁₅₀ x 100%
= 10%

Answer(s): 10%