Tank H contained 4 times as many guppies as Tank J. When 30% of the guppies in Tank H and 30% of the guppies in Tank J were transferred to Tank K, Tank K had 75 guppies, which was 25% more guppies than before. How many less guppies were there in Tank J than Tank H in the end?
|
Tank H |
Tank J |
Tank K |
Before |
4 u |
1 u |
4x1.5 = 6 u |
Change |
- 1.2 u |
- 0.3 u |
+ 1x1.5 = + 1.5 u |
After |
2.8 u |
0.7 u |
5x1.5 = 7.5 u |
Number of guppies that were transferred from Tank H to Tank K
= 30% x 4 u
=
30100 x 4 u
= 1.2 u
Number of guppies that were transferred from Tank J to Tank K
= 30% x 1 u
=
30100 x 1 u
= 0.3 u
25% =
25100 =
14Some guppies from Tank H and Tank J were transferred to Tank K. The total number of guppies transferred from Tank H and Tank J into Tank K is the same.
Total number of guppies transferred from Tank H and Tank J into Tank K
= 1.2 u + 0.3 u
= 1.5 u
7.5 u = 75
1 u = 75 ÷ 7.5 = 10
Number of less guppies in Tank J than Tank H
= 2.8 u - 0.7 u
= 2.1 u
= 2.1 x 10
= 21
Answer(s): 21