Tank H contained 3 times as many guppies as Tank J. When 40% of the guppies in Tank H and 40% of the guppies in Tank J were transferred to Tank K, Tank K had 192 guppies, which was 50% more guppies than before. How many more guppies were there in Tank K than Tank J in the end?

	Tank H	Tank J	Tank K
Before	3 u	1 u	2x1.6 = 3.2 u
Change	- 1.2 u	- 0.4 u	+ 1x1.6 = + 1.6 u
After	1.8 u	0.6 u	3x1.6 = 4.8 u

Number of guppies that were transferred from Tank H to Tank K
= 40% x 3 u
= ⁴⁰₁₀₀ x 3 u
= 1.2 u

Number of guppies that were transferred from Tank J to Tank K
= 40% x 1 u
= ⁴⁰₁₀₀ x 1 u
= 0.4 u

50% = ⁵⁰₁₀₀ = ¹₂

Some guppies from Tank H and Tank J were transferred to Tank K.  The total number of guppies transferred from Tank H and Tank J into Tank K is the same.

Total number of guppies transferred from Tank H and Tank J into Tank K
= 1.2 u + 0.4 u
= 1.6 u

4.8 u = 192

1 u = 192 ÷ 4.8 = 40

Number of more guppies in Tank K than Tank J
= 4.8 u - 0.6 u
= 4.2 u
= 4.2 x 40
= 168

Answer(s): 168