Tank W contained 3 times as many guppies as Tank X. When 30% of the guppies in Tank W and 40% of the guppies in Tank X were transferred to Tank Y, Tank Y had 130 guppies, which was 25% more guppies than before. How many less guppies were there in Tank X than Tank W in the end?
|
Tank W |
Tank X |
Tank Y |
Before |
3 u |
1 u |
4x1.3 = 5.2 u |
Change |
- 0.9 u |
- 0.4 u |
+ 1x1.3 = + 1.3 u |
After |
2.1 u |
0.6 u |
5x1.3 = 6.5 u |
Number of guppies that were transferred from Tank W to Tank Y
= 30% x 3 u
=
30100 x 3 u
= 0.9 u
Number of guppies that were transferred from Tank X to Tank Y
= 40% x 1 u
=
40100 x 1 u
= 0.4 u
25% =
25100 =
14Some guppies from Tank W and Tank X were transferred to Tank Y. The total number of guppies transferred from Tank W and Tank X into Tank Y is the same.
Total number of guppies transferred from Tank W and Tank X into Tank Y
= 0.9 u + 0.4 u
= 1.3 u
6.5 u = 130
1 u = 130 ÷ 6.5 = 20
Number of less guppies in Tank X than Tank W
= 2.1 u - 0.6 u
= 1.5 u
= 1.5 x 20
= 30
Answer(s): 30