Tank S contained 4 times as many guppies as Tank T. When 20% of the guppies in Tank S and 30% of the guppies in Tank T were transferred to Tank U, Tank U had 132 guppies, which was 20% more guppies than before. How many less guppies were there in Tank T than Tank S in the end?
|
Tank S |
Tank T |
Tank U |
Before |
4 u |
1 u |
5x1.1 = 5.5 u |
Change |
- 0.8 u |
- 0.3 u |
+ 1x1.1 = + 1.1 u |
After |
3.2 u |
0.7 u |
6x1.1 = 6.6 u |
Number of guppies that were transferred from Tank S to Tank U
= 20% x 4 u
=
20100 x 4 u
= 0.8 u
Number of guppies that were transferred from Tank T to Tank U
= 30% x 1 u
=
30100 x 1 u
= 0.3 u
20% =
20100 =
15Some guppies from Tank S and Tank T were transferred to Tank U. The total number of guppies transferred from Tank S and Tank T into Tank U is the same.
Total number of guppies transferred from Tank S and Tank T into Tank U
= 0.8 u + 0.3 u
= 1.1 u
6.6 u = 132
1 u = 132 ÷ 6.6 = 20
Number of less guppies in Tank T than Tank S
= 3.2 u - 0.7 u
= 2.5 u
= 2.5 x 20
= 50
Answer(s): 50