The ratio of persimmons to starfruits is 2 : 5. If 16 starfruits are added, the ratio of persimmons to starfruits will be 2 : 9. How many less persimmons than starfruits are there in the end?
| |
Persimmons |
Starfruits |
| Before |
2 u |
5 u |
| Change |
|
+ 16 |
| After |
2 u |
9 u |
The number of persimmons at first and in the end remains unchanged.
Number of starfruits added
= 9 u - 5 u
= 4 u
4 u = 16
1 u = 16 ÷ 4 = 4
Number of less persimmons than starfruits in the end
= 9 u - 2 u
= 7 u
= 7 x 4
= 28
Answer(s): 28
