Three girls used the same number of seashells to make bracelets. Ivory used
25 of her seashells, Barbara used
34 of hers and Emma used
23 of hers. They had a total of 160 seashells at first. How many seashells did each girl use?
Make the numerators the same.
LCM of 2, 3 and 2 = 6
25 Ivory's seashells =
34 Barbara's seashells =
23 Emma's seashells
2x35x3 Ivory's seashells =
3x24x2 Barbara's seashells =
2x33x3 Emma's seashells
615 Ivory's seashells =
68 Barbara's seashells =
69 Emma's seashells
| |
Ivory |
Barbara |
Emma |
| Before |
15 u |
8 u |
9 u |
| Change |
- 6 u |
- 6 u |
- 6 u |
| After |
9 u |
2 u |
3 u |
Total number of seashells at first
= 15 u + 8 u + 9 u
= 32 u
32 u = 160
1 u = 160 ÷ 32 = 5
Number of seashells that each girl used
= 6 u
= 6 x 5
= 30
Answer(s): 30
