Tank G contained 3 times as many guppies as Tank H. When 20% of the guppies in Tank G and 20% of the guppies in Tank H were transferred to Tank J, Tank J had 144 guppies, which was 20% more guppies than before. How many more guppies were there in Tank J than Tank H in the end?
|
Tank G |
Tank H |
Tank J |
Before |
3 u |
1 u |
5x0.8 = 4 u |
Change |
- 0.6 u |
- 0.2 u |
+ 1x0.8 = + 0.8 u |
After |
2.4 u |
0.8 u |
6x0.8 = 4.8 u |
Number of guppies that were transferred from Tank G to Tank J
= 20% x 3 u
=
20100 x 3 u
= 0.6 u
Number of guppies that were transferred from Tank H to Tank J
= 20% x 1 u
=
20100 x 1 u
= 0.2 u
20% =
20100 =
15Some 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
= 0.6 u + 0.2 u
= 0.8 u
4.8 u = 144
1 u = 144 ÷ 4.8 = 30
Number of more guppies in Tank J than Tank H
= 4.8 u - 0.8 u
= 4 u
= 4 x 30
= 120
Answer(s): 120