The average number of oranges in Container B, Container C and Container D is 40 and it is 10 more than the average number of apples in the 3 containers. ¹₅ of the apples are in Container B and the apples in Container B is 60% of the number of apples in Container C. If each container has the same number of fruits, what percentage of the fruits in Container D are oranges?
Average number of apples
= 40 - 10
= 30

Total number of apples
= 3 x 30
= 90

Total number of oranges
= 3 x 40 
= 120

Total number of fruits
= 90 + 120
= 210

Number of fruits in each container
= 210 ÷ 3
= 70

Apples in Container B	Apples in Container C	Apples in Container D	Total apples
1x3	4x3		5x3
3x1	5x1
3 u	5 u	7 u	15 u

60% = ⁶⁰₁₀₀ = ³₅

The number of apples in Container B is repeated.  Make the number of apples in Container B the same.  LCM of 1 and 3 is 3. 

Total number of apples
= 3 u + 5 u + 7 u
= 15 u

15 u = 90

1 u = 90 ÷ 15 = 6

Number of apples in Container D
= 7 u
= 7 x 6
= 42

Number of oranges in Container D
= 70 - 42
= 28

Percentage of the fruits in Container D are oranges
= ²⁸₇₀ x 100%
= 40%

Answer(s): 40%