There was an equal number of mangosteens and kiwis. On Wednesday, some mangosteens were added, such that the number of mangosteens increased by 80%. On Thursday, the number of mangosteens further increased by 50% and the number of kiwis decreased by 30%. There were 60 more mangosteens than kiwis in the end. How many mangosteens and kiwis were there altogether at first?

	Mangosteens	Kiwis
Before	1 u	1 u
Change 1	+ 0.8 u	No change
After 1	1.8 u	1 u
Change 2	+ 0.9 u	- 0.3 u
After 2	2.7 u	0.7 u

Number of mangosteens added on Wednesday
= 80% x 1 u
= ⁸⁰₁₀₀ x 1 u
= 0.8 u

Number of mangosteens increased on Thursday
= 50% x 1.8 u
= ⁵⁰₁₀₀ x 1.8 u
= 0.9 u

Number of kiwis decreased on Thursday
= 30% x 1 u
= ³⁰₁₀₀ x 1 u
= 0.3 u

Number of more mangosteens than kiwis in the end
= 2.7 u - 0.7 u
= 2 u

2 u = 60

1 u = 60 ÷ 2 = 30

Total number of mangosteens and kiwis at first
= 1 u + 1 u
= 2 u
= 2 x 30
= 60

Answer(s): 60