Tank L contained 4 times as many guppies as Tank M. When 50% of the guppies in Tank L and 30% of the guppies in Tank M were transferred to Tank N, Tank N had 69 guppies, which was 50% more guppies than before. How many more guppies were there in Tank N than Tank M in the end?
|
Tank L |
Tank M |
Tank N |
Before |
4 u |
1 u |
2x2.3 = 4.6 u |
Change |
- 2 u |
- 0.3 u |
+ 1x2.3 = + 2.3 u |
After |
2 u |
0.7 u |
3x2.3 = 6.9 u |
Number of guppies that were transferred from Tank L to Tank N
= 50% x 4 u
=
50100 x 4 u
= 2 u
Number of guppies that were transferred from Tank M to Tank N
= 30% x 1 u
=
30100 x 1 u
= 0.3 u
50% =
50100 =
12Some guppies from Tank L and Tank M were transferred to Tank N. The total number of guppies transferred from Tank L and Tank M into Tank N is the same.
Total number of guppies transferred from Tank L and Tank M into Tank N
= 2 u + 0.3 u
= 2.3 u
6.9 u = 69
1 u = 69 ÷ 6.9 = 10
Number of more guppies in Tank N than Tank M
= 6.9 u - 0.7 u
= 6.2 u
= 6.2 x 10
= 62
Answer(s): 62