Kimberly and Rachel collected beads. Rachel gave 70% of her beads to Kimberly. As a result, Kimberly's beads increased by 25%. If Kimberly had 140 beads left, find the total number of beads the two girls had at first.
| |
Comparing the change
in Rachel's beads |
Rachel |
Kimberly |
| Before |
10x1 =
10 u |
|
4x7 =
28 u |
| Change |
- 7x1 =
- 7 u |
- 1x7 =
- 7 u |
+ 1x7 =
+ 7 u |
| After |
3x1 =
3 u |
|
5x7 =
35 u |
70% =
70100 =
710 25% =
25100 =
14 The number of beads that Kimberly gave to Rachel is repeated. Make the number of beads that Kimberly gave to Rachel the same. LCM of 1 and 7 is 7.
Number of beads that Kimberly had in the end = 35 u
35 u = 140
1 u = 140 ÷ 35 = 4
Number of beads that Rachel and Kimberly had at first
= 10 u + 28 u
= 38 u
= 38 x 4
= 152
Answer(s): 152
