There was an equal number of kiwis and grapefruits. On Wednesday, some kiwis were added, such that the number of kiwis increased by 80%. On Thursday, the number of kiwis further increased by 50% and the number of grapefruits decreased by 10%. There were 162 more kiwis than grapefruits in the end. How many kiwis and grapefruits were there altogether at first?

	Kiwis	Grapefruits
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 kiwis added on Wednesday
= 80% x 1 u
= ⁸⁰₁₀₀ x 1 u
= 0.8 u

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

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

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

1.8 u = 162

1 u = 162 ÷ 1.8 = 90

Total number of kiwis and grapefruits at first
= 1 u + 1 u
= 2 u
= 2 x 90
= 180

Answer(s): 180