Tank J contained 2 times as many guppies as Tank K. When 20% of the guppies in Tank J and 20% of the guppies in Tank K were transferred to Tank L, Tank L had 30 guppies, which was 25% more guppies than before. How many more guppies were there in Tank L than Tank K in the end?
|
Tank J |
Tank K |
Tank L |
Before |
2 u |
1 u |
4x0.6 = 2.4 u |
Change |
- 0.4 u |
- 0.2 u |
+ 1x0.6 = + 0.6 u |
After |
1.6 u |
0.8 u |
5x0.6 = 3 u |
Number of guppies that were transferred from Tank J to Tank L
= 20% x 2 u
=
20100 x 2 u
= 0.4 u
Number of guppies that were transferred from Tank K to Tank L
= 20% x 1 u
=
20100 x 1 u
= 0.2 u
25% =
25100 =
14Some guppies from Tank J and Tank K were transferred to Tank L. The total number of guppies transferred from Tank J and Tank K into Tank L is the same.
Total number of guppies transferred from Tank J and Tank K into Tank L
= 0.4 u + 0.2 u
= 0.6 u
3 u = 30
1 u = 30 ÷ 3 = 10
Number of more guppies in Tank L than Tank K
= 3 u - 0.8 u
= 2.2 u
= 2.2 x 10
= 22
Answer(s): 22