PSLE The ratio of the number of skirts to that of sweaters in a boutique was 9 : 8 in the end. After 14 sweaters were sold, the ratio of the number of skirts to that of sweaters became 2 : 1. What was the total number of skirts and sweaters in the boutique in the end?
|
Skirts |
Sweaters |
Total |
Before |
9x2 = 18 u |
8x2 = 16 u |
34 u |
Change |
|
- 14 |
|
After |
2x9 = 18 u |
1x9 = 9 u |
27 u |
The number of skirts remains unchanged.
Make the number of skirts the same.
LCM of 8 and 9 is 18.
Number of sweaters sold
= 16 u - 9 u
= 7 u
1 u = 14 ÷ 7 = 2
Total number of skirts and sweaters in the end
= 18 u + 9 u
= 27 u
= 27 x 2
= 54
Answer(s): 54