A drink stall had 132 big and small packets of milk. The number of big packets is
29 of the number of small packets. After selling a few small packets of milk, there are
13 as many big packets as small packets left. How many small packets of milk were sold?
| |
Big packets |
Small packets |
Total |
| Before |
2 u |
9 u |
11 u |
| Change |
|
- 3 u |
|
| After |
1x2 =
2 u |
3x2 =
6 u |
|
The number of big packets remains unchanged. Make the number of big packets the same. LCM of 2 and 1 is 2.
Number of big packets at first = 2 u
Number of small packets at first = 9 u
Total number of packets at first
= 2 u + 9 u
= 11 u
11 u = 132
1 u = 132 ÷ 11 = 12
Number of small packets sold
= 9 u - 6 u
= 3 u
= 3 x 12
= 36
Answer(s): 36
