Three hours ago, a store owner started his day with some starfruits and pears in the ratio of 8 : 3. There were 75 pears. Some of the starfruits were bought by Lynn. As a result, the number of starfruits became
25 of the pears.
- How many starfruits did the store owner have left?
- How many starfruits did the store owner have to buy in order to have an equal number of starfruits and pears?
|
Starfruits |
Pears |
Before |
8x5 = 40 u |
3x5 = 15 u |
Change |
- ? |
|
After |
2x3 = 6 u |
5x3 = 15 u |
(a)
The number of pears remains unchanged. Make the number of pears the same. LCM of 3 and 5 is 15.
15 u = 75
1 u = 75 ÷ 15 = 5
Number of starfruits that the store owner had left
= 6 u
= 6 x 5
= 30
(b)
Number of starfruits that the store owner had to buy to have an equal number of starfruits and pears
= 15 u - 6 u
= 9 u
= 9 x 5
= 45
Answer(s): (a) 30; (b) 45