There was an equal number of guavas and mangoes. On Wednesday, some guavas were added, such that the number of guavas increased by 80%. On Thursday, the number of guavas further increased by 50% and the number of mangoes decreased by 10%. There were 144 more guavas than mangoes in the end. How many guavas and mangoes were there altogether at first?

	Guavas	Mangoes
Before	1 u	1 u
Change 1	+ 0.8 u	No change
After 1	1.8 u	1 u
Change 2	+ 0.9 u	- 0.1 u
After 2	2.7 u	0.9 u

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

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

Number of mangoes decreased on Thursday
= 10% x 1 u
= ¹⁰₁₀₀ x 1 u
= 0.1 u

Number of more guavas than mangoes in the end
= 2.7 u - 0.9 u
= 1.8 u

1.8 u = 144

1 u = 144 ÷ 1.8 = 80

Total number of guavas and mangoes at first
= 1 u + 1 u
= 2 u
= 2 x 80
= 160

Answer(s): 160