A store owner has 50 less persimmons than oranges. After he sold 80% of the persimmons and 35% of the oranges, he is left with 8 less persimmons than oranges. What fraction of the fruits left were persimmons?

	Persimmons		Oranges
Comparing persimmons and oranges at first			50 less
Before	5x4 = 20 u	+ 50	20x1 = 20 u
Change	- 4x4 = - 16 u	- 40	- 7x1 = - 7 u
After	1x4 = 4 u	+ 10	13x1 = 13 u
Comparing persimmons  and oranges in the end	8 less

80% = ⁸⁰₁₀₀ = ⁴₅ 
80% x 50 = ⁴₅ x 50 = 40
50 - 40 = 10

35% = ³⁵₁₀₀ = ⁷₂₀ 

The number of persimmons is 8 less than the number of oranges in the end. So, if another 8 persimmons are added, the number of persimmons and oranges in the end will be the same.

4 u + 10 + 8 = 13 u
4 u + 18 = 13 u
13 u - 4 u = 18
9 u = 18

1 u = 18 ÷ 9 = 2

Number of persimmons left
= 4 u + 10
= 4 x 2 + 10
= 8 + 10
= 18

Total number of fruits left
= 4 u + 10 + 13 u
= 17 u + 10
= 17 x 2 + 10
= 34 + 10
= 44

^{Persimmons left}_{Total fruits left} = ¹⁸₄₄ = ⁹₂₂

Answer(s): ⁹₂₂