Tank K contained 4 times as many guppies as Tank L. When 10% of the guppies in Tank K and 20% of the guppies in Tank L were transferred to Tank M, Tank M had 30 guppies, which was 25% more guppies than before. How many less guppies were there in Tank L than Tank K in the end?
|
Tank K |
Tank L |
Tank M |
Before |
4 u |
1 u |
4x0.6 = 2.4 u |
Change |
- 0.4 u |
- 0.2 u |
+ 1x0.6 = + 0.6 u |
After |
3.6 u |
0.8 u |
5x0.6 = 3 u |
Number of guppies that were transferred from Tank K to Tank M
= 10% x 4 u
=
10100 x 4 u
= 0.4 u
Number of guppies that were transferred from Tank L to Tank M
= 20% x 1 u
=
20100 x 1 u
= 0.2 u
25% =
25100 =
14Some guppies from Tank K and Tank L were transferred to Tank M. The total number of guppies transferred from Tank K and Tank L into Tank M is the same.
Total number of guppies transferred from Tank K and Tank L into Tank M
= 0.4 u + 0.2 u
= 0.6 u
3 u = 30
1 u = 30 ÷ 3 = 10
Number of less guppies in Tank L than Tank K
= 3.6 u - 0.8 u
= 2.8 u
= 2.8 x 10
= 28
Answer(s): 28