PSLE The ratio of the number of dresses to that of windbreakers in a factory outlet was 8 : 7 at first. After 152 windbreakers were sold, the ratio of the number of dresses to that of windbreakers became 5 : 2. What was the total number of dresses and windbreakers in the factory outlet at first?
|
Dresses |
Windbreakers |
Total |
Before |
8x5 = 40 u |
7x5 = 35 u |
75 u |
Change |
|
- 152 |
|
After |
5x8 = 40 u |
2x8 = 16 u |
56 u |
The number of dresses remains unchanged. Make the number of dresses the same.
LCM of 5 and 8 is 40.
Number of windbreakers sold
= 35 u - 16 u
= 19 u
1 u = 152 ÷ 19 = 8
Total number of dresses and windbreakers at first
= 40 u + 35 u
= 75 u
= 75 x 8
= 600
Answer(s): 600