A drink stall had 76 big and small packets of juice. The number of big packets is
316 of the number of small packets. After selling a few small packets of juice, there are
15 as many big packets as small packets left. How many small packets of juice were sold?
|
Big packets |
Small packets |
Total |
Before |
3 u |
16 u |
19 u |
Change |
|
- 1 u |
|
After |
1x3 = 3 u |
5x3 = 15 u |
|
The number of big packets remains unchanged. Make the number of big packets the same. LCM of 3 and 1 is 3.
Number of big packets at first = 3 u
Number of small packets at first = 16 u
Total number of packets at first
= 3 u + 16 u
= 19 u
19 u = 76
1 u = 76 ÷ 19 = 4
Number of small packets sold
= 16 u - 15 u
= 1 u
= 4
Answer(s): 4