Tank D contained 2 times as many guppies as Tank E. When 40% of the guppies in Tank D and 30% of the guppies in Tank E were transferred to Tank F, Tank F had 132 guppies, which was 50% more guppies than before. How many more guppies were there in Tank F than Tank E in the end?

	Tank D	Tank E	Tank F
Before	2 u	1 u	2x1.1 = 2.2 u
Change	- 0.8 u	- 0.3 u	+ 1x1.1 = + 1.1 u
After	1.2 u	0.7 u	3x1.1 = 3.3 u

Number of guppies that were transferred from Tank D to Tank F
= 40% x 2 u
= ⁴⁰₁₀₀ x 2 u
= 0.8 u

Number of guppies that were transferred from Tank E to Tank F
= 30% x 1 u
= ³⁰₁₀₀ x 1 u
= 0.3 u

50% = ⁵⁰₁₀₀ = ¹₂

Some guppies from Tank D and Tank E were transferred to Tank F.  The total number of guppies transferred from Tank D and Tank E into Tank F is the same.

Total number of guppies transferred from Tank D and Tank E into Tank F
= 0.8 u + 0.3 u
= 1.1 u

3.3 u = 132

1 u = 132 ÷ 3.3 = 40

Number of more guppies in Tank F than Tank E
= 3.3 u - 0.7 u
= 2.6 u
= 2.6 x 40
= 104

Answer(s): 104