Tank G contained 4 times as many guppies as Tank H. When 30% of the guppies in Tank G and 10% of the guppies in Tank H were transferred to Tank J, Tank J had 39 guppies, which was 50% more guppies than before. How many less guppies were there in Tank H than Tank G in the end?
|
Tank G |
Tank H |
Tank J |
Before |
4 u |
1 u |
2x1.3 = 2.6 u |
Change |
- 1.2 u |
- 0.1 u |
+ 1x1.3 = + 1.3 u |
After |
2.8 u |
0.9 u |
3x1.3 = 3.9 u |
Number of guppies that were transferred from Tank G to Tank J
= 30% x 4 u
=
30100 x 4 u
= 1.2 u
Number of guppies that were transferred from Tank H to Tank J
= 10% x 1 u
=
10100 x 1 u
= 0.1 u
50% =
50100 =
12Some 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
= 1.2 u + 0.1 u
= 1.3 u
3.9 u = 39
1 u = 39 ÷ 3.9 = 10
Number of less guppies in Tank H than Tank G
= 2.8 u - 0.9 u
= 1.9 u
= 1.9 x 10
= 19
Answer(s): 19