Five hours ago, a store owner started his day with some chikoos and pears in the ratio of 5 : 4. There were 200 pears. Some of the chikoos were bought by Elyse. As a result, the number of chikoos became
45 of the pears.
- How many chikoos did the store owner have left?
- How many chikoos did the store owner have to buy in order to have an equal number of chikoos and pears?
|
Chikoos |
Pears |
Before |
5x5 = 25 u |
4x5 = 20 u |
Change |
- ? |
|
After |
4x4 = 16 u |
5x4 = 20 u |
(a)
The number of pears remains unchanged. Make the number of pears the same. LCM of 4 and 5 is 20.
20 u = 200
1 u = 200 ÷ 20 = 10
Number of chikoos that the store owner had left
= 16 u
= 16 x 10
= 160
(b)
Number of chikoos that the store owner had to buy to have an equal number of chikoos and pears
= 20 u - 16 u
= 4 u
= 4 x 10
= 40
Answer(s): (a) 160; (b) 40