A drink stall had 81 big and small bottles of orange juice. The number of big bottles is
27 of the number of small bottles. After selling a few small bottles of orange juice, there are
12 as many big bottles as small bottles left. How many small bottles of orange juice were sold?
| |
Big bottles |
Small bottles |
Total |
| Before |
2 u |
7 u |
9 u |
| Change |
|
- 3 u |
|
| After |
1x2 =
2 u |
2x2 =
4 u |
|
The number of big bottles remains unchanged. Make the number of big bottles the same. LCM of 2 and 1 is 2.
Number of big bottles at first = 2 u
Number of small bottles at first = 7 u
Total number of bottles at first
= 2 u + 7 u
= 9 u
9 u = 81
1 u = 81 ÷ 9 = 9
Number of small bottles sold
= 7 u - 4 u
= 3 u
= 3 x 9
= 27
Answer(s): 27
