Tank U contained 3 times as many guppies as Tank V. When 20% of the guppies in Tank U and 30% of the guppies in Tank V were transferred to Tank W, Tank W had 108 guppies, which was 50% more guppies than before. How many less guppies were there in Tank V than Tank U in the end?
|
Tank U |
Tank V |
Tank W |
Before |
3 u |
1 u |
2x0.9 = 1.8 u |
Change |
- 0.6 u |
- 0.3 u |
+ 1x0.9 = + 0.9 u |
After |
2.4 u |
0.7 u |
3x0.9 = 2.7 u |
Number of guppies that were transferred from Tank U to Tank W
= 20% x 3 u
=
20100 x 3 u
= 0.6 u
Number of guppies that were transferred from Tank V to Tank W
= 30% x 1 u
=
30100 x 1 u
= 0.3 u
50% =
50100 =
12Some guppies from Tank U and Tank V were transferred to Tank W. The total number of guppies transferred from Tank U and Tank V into Tank W is the same.
Total number of guppies transferred from Tank U and Tank V into Tank W
= 0.6 u + 0.3 u
= 0.9 u
2.7 u = 108
1 u = 108 ÷ 2.7 = 40
Number of less guppies in Tank V than Tank U
= 2.4 u - 0.7 u
= 1.7 u
= 1.7 x 40
= 68
Answer(s): 68