A drink stall had 110 big and small packets of coffee. The number of big packets is
38 of the number of small packets. After selling a few small packets of coffee, there are
12 as many big packets as small packets left. How many small packets of coffee were sold?
| |
Big packets |
Small packets |
Total |
| Before |
3 u |
8 u |
11 u |
| Change |
|
- 2 u |
|
| After |
1x3 =
3 u |
2x3 =
6 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 = 8 u
Total number of packets at first
= 3 u + 8 u
= 11 u
11 u = 110
1 u = 110 ÷ 11 = 10
Number of small packets sold
= 8 u - 6 u
= 2 u
= 2 x 10
= 20
Answer(s): 20
