Roshel and Kylie collected buttons. Kylie gave 60% of her buttons to Roshel. As a result, Roshel's buttons increased by 20%. If Roshel had 198 buttons left, find the total number of buttons the two girls had at first.
| |
Comparing the change
in Kylie's buttons |
Kylie |
Roshel |
| Before |
5x1 =
5 u |
|
5x3 =
15 u |
| Change |
- 3x1 =
- 3 u |
- 1x3 =
- 3 u |
+ 1x3 =
+ 3 u |
| After |
2x1 =
2 u |
|
6x3 =
18 u |
60% =
60100 =
35 20% =
20100 =
15 The number of buttons that Roshel gave to Kylie is repeated. Make the number of buttons that Roshel gave to Kylie the same. LCM of 1 and 3 is 3.
Number of buttons that Roshel had in the end = 18 u
18 u = 198
1 u = 198 ÷ 18 = 11
Number of buttons that Kylie and Roshel had at first
= 5 u + 15 u
= 20 u
= 20 x 11
= 220
Answer(s): 220
