The ratio of mangosteens to persimmons is 2 : 7. If 40 persimmons are added, the ratio of mangosteens to persimmons will be 2 : 11. How many less mangosteens than persimmons are there in the end?
| |
Mangosteens |
Persimmons |
| Before |
2 u |
7 u |
| Change |
|
+ 40 |
| After |
2 u |
11 u |
The number of mangosteens at first and in the end remains unchanged.
Number of persimmons added
= 11 u - 7 u
= 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
Number of less mangosteens than persimmons in the end
= 11 u - 2 u
= 9 u
= 9 x 10
= 90
Answer(s): 90
