Natalie and Risa shared some earpins. Natalie's share was 40% of Risa's share. She then increased her share of the earpins by taking 20% of Risa's share. Given that Natalie had 15 fewer earpins than Risa in the end, how many earpins did the girls have altogether?
| |
Natalie |
Risa |
Difference |
Total |
| Before |
2 u |
5 u |
|
7 u |
| Change |
+ 1 u |
- 1 u |
|
|
| After |
3 u |
4 u |
1 u |
7 u |
40% =
40100 =
25Number of earpins that Natalie took from Risa
= 20% x 5 u
=
20100 x 5 u
= 1 u
Number of fewer earpins that Natalie had than Risa in the end = 1 u
1 u = 15
1 u = 15 ÷ 1 = 15
Total number of earpins that the girls had
= 7 u
= 7 x 15
= 105
Answer(s): 105
