A store owner has 36 less persimmons than oranges. After he sold 75% of the persimmons and 40% of the oranges, he is left with 68 less persimmons than oranges. What fraction of the fruits left were persimmons?

	Persimmons		Oranges
Comparing persimmons and oranges at first			36 less
Before	4x5 = 20 u	+ 36	5x4 = 20 u
Change	- 3x5 = - 15 u	- 27	- 2x4 = - 8 u
After	1x5 = 5 u	+ 9	3x4 = 12 u
Comparing persimmons  and oranges in the end	68 less

75% = ⁷⁵₁₀₀ = ³₄ 
75% x 36 = ³₄ x 36 = 27
36 - 27 = 9

40% = ⁴⁰₁₀₀ = ²₅ 

The number of persimmons is 68 less than the number of oranges in the end. So, if another 68 persimmons are added, the number of persimmons and oranges in the end will be the same.

5 u + 9 + 68 = 12 u
5 u + 77 = 12 u
12 u - 5 u = 77
7 u = 77

1 u = 77 ÷ 7 = 11

Number of persimmons left
= 5 u + 9
= 5 x 11 + 9
= 55 + 9
= 64

Total number of fruits left
= 5 u + 9 + 12 u
= 17 u + 9
= 17 x 11 + 9
= 187 + 9
= 196

^{Persimmons left}_{Total fruits left} = ⁶⁴₁₉₆ = ¹⁶₄₉

Answer(s): ¹⁶₄₉