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

	Grapefruits	Persimmons
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 grapefruits added on Thursday
= 80% x 1 u
= ⁸⁰₁₀₀ x 1 u
= 0.8 u

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

Number of persimmons decreased on Friday
= 30% x 1 u
= ³⁰₁₀₀ x 1 u
= 0.3 u

Number of more grapefruits than persimmons in the end
= 2.7 u - 0.7 u
= 2 u

2 u = 60

1 u = 60 ÷ 2 = 30

Total number of grapefruits and persimmons at first
= 1 u + 1 u
= 2 u
= 2 x 30
= 60

Answer(s): 60