Tank T contained 4 times as many guppies as Tank U. When 30% of the guppies in Tank T and 30% of the guppies in Tank U were transferred to Tank V, Tank V had 135 guppies, which was 50% more guppies than before. How many more guppies were there in Tank V than Tank U in the end?

	Tank T	Tank U	Tank V
Before	4 u	1 u	2x1.5 = 3 u
Change	- 1.2 u	- 0.3 u	+ 1x1.5 = + 1.5 u
After	2.8 u	0.7 u	3x1.5 = 4.5 u

Number of guppies that were transferred from Tank T to Tank V
= 30% x 4 u
= ³⁰₁₀₀ x 4 u
= 1.2 u

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

50% = ⁵⁰₁₀₀ = ¹₂

Some guppies from Tank T and Tank U were transferred to Tank V.  The total number of guppies transferred from Tank T and Tank U into Tank V is the same.

Total number of guppies transferred from Tank T and Tank U into Tank V
= 1.2 u + 0.3 u
= 1.5 u

4.5 u = 135

1 u = 135 ÷ 4.5 = 30

Number of more guppies in Tank V than Tank U
= 4.5 u - 0.7 u
= 3.8 u
= 3.8 x 30
= 114

Answer(s): 114