A store owner has 28 less chikoos than pomegranates. After he sold 75% of the chikoos and 10% of the pomegranates, he is left with 45 less chikoos than pomegranates. What fraction of the fruits left were chikoos?

	Chikoos		Pomegranates
Comparing chikoos and pomegranates at first			28 less
Before	4x5 = 20 u	+ 28	10x2 = 20 u
Change	- 3x5 = - 15 u	- 21	- 1x2 = - 2 u
After	1x5 = 5 u	+ 7	9x2 = 18 u
Comparing chikoos  and pomegranates in the end	45 less

75% = ⁷⁵₁₀₀ = ³₄ 
75% x 28 = ³₄ x 28 = 21
28 - 21 = 7

10% = ¹⁰₁₀₀ = ¹₁₀ 

The number of chikoos is 45 less than the number of pomegranates in the end. So, if another 45 chikoos are added, the number of chikoos and pomegranates in the end will be the same.

5 u + 7 + 45 = 18 u
5 u + 52 = 18 u
18 u - 5 u = 52
13 u = 52

1 u = 52 ÷ 13 = 4

Number of chikoos left
= 5 u + 7
= 5 x 4 + 7
= 20 + 7
= 27

Total number of fruits left
= 5 u + 7 + 18 u
= 23 u + 7
= 23 x 4 + 7
= 92 + 7
= 99

^{Chikoos left}_{Total fruits left} = ²⁷₉₉ = ³₁₁

Answer(s): ³₁₁