A drink stall had 45 small and big packets of orange juice. The number of small packets is
213 of the number of big packets. After selling a few big packets of orange juice, there are
15 as many small packets as big packets left. How many big packets of orange juice were sold?
|
Small packets |
Big packets |
Total |
Before |
2 u |
13 u |
15 u |
Change |
|
- 3 u |
|
After |
1x2 = 2 u |
5x2 = 10 u |
|
The number of small packets remains unchanged. Make the number of small packets the same. LCM of 2 and 1 is 2.
Number of small packets at first = 2 u
Number of big packets at first = 13 u
Total number of packets at first
= 2 u + 13 u
= 15 u
15 u = 45
1 u = 45 ÷ 15 = 3
Number of big packets sold
= 13 u - 10 u
= 3 u
= 3 x 3
= 9
Answer(s): 9