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

	Mangoes	Mangosteens
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 mangoes added on Saturday
= 80% x 1 u
= ⁸⁰₁₀₀ x 1 u
= 0.8 u

Number of mangoes increased on Sunday
= 50% x 1.8 u
= ⁵⁰₁₀₀ x 1.8 u
= 0.9 u

Number of mangosteens decreased on Sunday
= 30% x 1 u
= ³⁰₁₀₀ x 1 u
= 0.3 u

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

2 u = 80

1 u = 80 ÷ 2 = 40

Total number of mangoes and mangosteens at first
= 1 u + 1 u
= 2 u
= 2 x 40
= 80

Answer(s): 80