Kylie had 90% as many jelly beans as Jean. Kylie gave away 20% of her jelly beans and Jean bought another 30 jelly beans. As a result, Kylie now has 60% as many jelly beans as Jean. Find the number of jelly beans that Kylie had in the end.
| |
Kylie |
Jean |
| Before |
9x3 |
10x3 |
| Change |
- 1.8x3 |
+ 30 |
| After |
7.2x3 |
10x3 + 30 |
Comparing Kylie and
Jean in the end |
3x7.2 |
5x7.2 |
| |
Kylie |
Jean |
| Before |
27 u |
30 u |
| Change |
- 5.4 u |
+ 30 |
After
|
21.6 u
|
30 u + 30 =
36 u |
90% =
90100 =
91020% x 9
=
20100 x 9
= 1.8
60% =
60100 =
35The number of jelly beans that Kylie had in the end is repeated.
Make the number of jelly beans that Kylie had in the end the same.
The number of jelly beans that Jean had in the end is repeated.
30 u + 30 = 36 u
36 u - 30 u = 30
6 u = 30
1 u = 30 ÷ 6 = 5
Number of jelly beans that Kylie had in the end
= 21.6 u
= 21.6 x 5
= 108
Answer: 108
