Cindy and Emily collected beads. Cindy gave 25% of her beads to Emily. As a result, Emily's beads increased by 80%. If Cindy had 84 beads left, find the total number of beads the two girls had at first.
| |
Cindy |
Emily |
Comparing the change
in Emily's beads |
| Before |
4x4 =
16 u |
|
5x1 =
5 u |
| Change |
- 1x4 =
- 4 u |
+ 1x4 =
+ 4 u |
+ 4x1 =
+ 4 u |
| After |
3x4 =
12 u |
|
9x1 =
9 u |
25% =
25100 =
14 80% =
80100 =
45 The number of beads that Cindy gave to Emily is repeated. Make the number of beads that Cindy gave to Emily the same. LCM of 1 and 4 is 4.
Number of beads that Cindy had in the end = 12 u
12 u = 84
1 u = 84 ÷ 12 = 7
Number of beads that Cindy and Emily had at first
= 16 u + 5 u
= 21 u
= 21 x 7
= 147
Answer(s): 147
