Fanny had 70% as many jelly beans as Joelle. Fanny gave away 10% of her jelly beans and Joelle bought another 30 jelly beans. As a result, Fanny now has 60% as many jelly beans as Joelle. Find the number of jelly beans that Fanny had in the end.
| |
Fanny |
Joelle |
| Before |
7x3 |
10x3 |
| Change |
- 0.7x3 |
+ 30 |
| After |
6.3x3 |
10x3 + 30 |
Comparing Fanny and
Joelle in the end |
3x6.3 |
5x6.3 |
| |
Fanny |
Joelle |
| Before |
21 u |
30 u |
| Change |
- 2.1 u |
+ 30 |
After
|
18.9 u
|
30 u + 30 =
31.5 u |
70% =
70100 =
71010% x 7
=
10100 x 7
= 0.7
60% =
60100 =
35The number of jelly beans that Fanny had in the end is repeated.
Make the number of jelly beans that Fanny had in the end the same.
The number of jelly beans that Joelle had in the end is repeated.
30 u + 30 = 31.5 u
31.5 u - 30 u = 30
1.5 u = 30
1 u = 30 ÷ 1.5 = 20
Number of jelly beans that Fanny had in the end
= 18.9 u
= 18.9 x 20
= 378
Answer: 378
