Kimberly has 6 times as many wafers as Xandra. The total number of Kimberly's and Xandra's wafers is 2 times of Gabby's. Kimberly and Xandra have 42 wafers more than Gabby's. How many less wafers does Gabby have than Kimberly?
| Kimberly |
Xandra |
Gabby |
| 6x2 |
1x2 |
|
| 2x7 |
1x7 |
| 12 u |
2 u |
7 u |
The total number of wafers that Kimberly and Xandra have is repeated. Make the total number of wafers that Kimberly and Xandra have the same. LCM of 7 and 2 is 14.
Total number of wafers that Kimberly and Xandra have
= 12 u + 2 u
= 14 u
Number of more wafers that Kimberly and Xandra have than Gabby
= 14 u - 7 u
= 7 u
7 u = 42
1 u = 42 ÷ 7 = 6
Number of less wafers that Gabby has than Kimberly
= 12 u - 7 u
= 5 u
= 5 x 6
= 30
Answer(s): 30
