There was an equal number of grapefruits and chikoos. On Wednesday, some grapefruits were added, such that the number of grapefruits increased by 80%. On Thursday, the number of grapefruits further increased by 50% and the number of chikoos decreased by 10%. There were 108 more grapefruits than chikoos in the end. How many grapefruits and chikoos were there altogether at first?

	Grapefruits	Chikoos
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 grapefruits added on Wednesday
= 80% x 1 u
= ⁸⁰₁₀₀ x 1 u
= 0.8 u

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

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

Number of more grapefruits than chikoos in the end
= 2.7 u - 0.9 u
= 1.8 u

1.8 u = 108

1 u = 108 ÷ 1.8 = 60

Total number of grapefruits and chikoos at first
= 1 u + 1 u
= 2 u
= 2 x 60
= 120

Answer(s): 120