The ratio of starfruits to grapefruits is 3 : 5. If 45 grapefruits are added, the ratio of starfruits to grapefruits will be 3 : 10. How many less starfruits than grapefruits are there in the end?
| |
Starfruits |
Grapefruits |
| Before |
3 u |
5 u |
| Change |
|
+ 45 |
| After |
3 u |
10 u |
The number of starfruits at first and in the end remains unchanged.
Number of grapefruits added
= 10 u - 5 u
= 5 u
5 u = 45
1 u = 45 ÷ 5 = 9
Number of less starfruits than grapefruits in the end
= 10 u - 3 u
= 7 u
= 7 x 9
= 63
Answer(s): 63
