Irene and Anna collected beads. Irene gave 30% of her beads to Anna and as a result, Anna's beads increased by 25%. If Irene had 77 beads left, find the number of beads Anna should give to Irene in the end so that both had an equal number of beads.
| |
Irene
|
Anna |
Comparing the change
in Anna's beads
|
|
Before
|
10x1 =
10 u |
|
4x3 =
12u |
|
Change
|
- 3x1 =
- 3 u
|
+ 3x1 =
+ 3 u
|
+ 1x3 =
+ 3 u
|
|
After
|
7x1 =
7 u
|
|
5x3 =
15 u |
30% =
30100 =
31025% =
25100 =
14The increase in the number of beads that Anna had is repeated. Make the increase in the number of beads that Anna had the same. LCM of 3 and 1 = 3
7 u = 77
1 u = 77 ÷ 7 = 11
Number of beads that Anna had more than Irene in the end
= 15 u - 7 u
= 8 u
Number of beads that Anna should give to Irene so that both had an equal number of beads in the end
= 8 u ÷ 2
= 4 u
= 4 x 11
= 44
Answer(s): 44
