Tank G contained 4 times as many guppies as Tank H. When 10% of the guppies in Tank G and 40% of the guppies in Tank H were transferred to Tank J, Tank J had 96 guppies, which was 50% more guppies than before. How many less guppies were there in Tank H than Tank G in the end?

	Tank G	Tank H	Tank J
Before	4 u	1 u	2x0.8 = 1.6 u
Change	- 0.4 u	- 0.4 u	+ 1x0.8 = + 0.8 u
After	3.6 u	0.6 u	3x0.8 = 2.4 u

Number of guppies that were transferred from Tank G to Tank J
= 10% x 4 u
= ¹⁰₁₀₀ x 4 u
= 0.4 u

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

50% = ⁵⁰₁₀₀ = ¹₂

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

Total number of guppies transferred from Tank G and Tank H into Tank J
= 0.4 u + 0.4 u
= 0.8 u

2.4 u = 96

1 u = 96 ÷ 2.4 = 40

Number of less guppies in Tank H than Tank G
= 3.6 u - 0.6 u
= 3 u
= 3 x 40
= 120

Answer(s): 120