The ratio of starfruits to dragonfruits is 2 : 7. If 28 dragonfruits are added, the ratio of starfruits to dragonfruits will be 2 : 11. How many less starfruits than dragonfruits are there in the end?
| |
Starfruits |
Dragonfruits |
| Before |
2 u |
7 u |
| Change |
|
+ 28 |
| After |
2 u |
11 u |
The number of starfruits at first and in the end remains unchanged.
Number of dragonfruits added
= 11 u - 7 u
= 4 u
4 u = 28
1 u = 28 ÷ 4 = 7
Number of less starfruits than dragonfruits in the end
= 11 u - 2 u
= 9 u
= 9 x 7
= 63
Answer(s): 63
