The ratio of dragonfruits to persimmons is 2 : 7. If 4 persimmons are added, the ratio of dragonfruits to persimmons will be 2 : 9. How many less dragonfruits than persimmons are there in the end?
| |
Dragonfruits |
Persimmons |
| Before |
2 u |
7 u |
| Change |
|
+ 4 |
| After |
2 u |
9 u |
The number of dragonfruits at first and in the end remains unchanged.
Number of persimmons added
= 9 u - 7 u
= 2 u
2 u = 4
1 u = 4 ÷ 2 = 2
Number of less dragonfruits than persimmons in the end
= 9 u - 2 u
= 7 u
= 7 x 2
= 14
Answer(s): 14
