A store owner has 56 less mangosteens than pears. After he sold 75% of the mangosteens and 30% of the pears, he is left with 49 less mangosteens than pears. What fraction of the fruits left were mangosteens?

	Mangosteens		Pears
Comparing mangosteens and pears at first			56 less
Before	4x5 = 20 u	+ 56	10x2 = 20 u
Change	- 3x5 = - 15 u	- 42	- 3x2 = - 6 u
After	1x5 = 5 u	+ 14	7x2 = 14 u
Comparing mangosteens  and pears in the end	49 less

75% = ⁷⁵₁₀₀ = ³₄ 
75% x 56 = ³₄ x 56 = 42
56 - 42 = 14

30% = ³⁰₁₀₀ = ³₁₀ 

The number of mangosteens is 49 less than the number of pears in the end. So, if another 49 mangosteens are added, the number of mangosteens and pears in the end will be the same.

5 u + 14 + 49 = 14 u
5 u + 63 = 14 u
14 u - 5 u = 63
9 u = 63

1 u = 63 ÷ 9 = 7

Number of mangosteens left
= 5 u + 14
= 5 x 7 + 14
= 35 + 14
= 49

Total number of fruits left
= 5 u + 14 + 14 u
= 19 u + 14
= 19 x 7 + 14
= 133 + 14
= 147

^{Mangosteens left}_{Total fruits left} = ⁴⁹₁₄₇ = ¹₃

Answer(s): ¹₃