The ratio of grapefruits to starfruits is 3 : 7. If 36 starfruits are added, the ratio of grapefruits to starfruits will be 3 : 11. How many more starfruits than grapefruits are there in the end?
| |
Grapefruits |
Starfruits |
| Before |
3 u |
7 u |
| Change |
|
+ 36 |
| After |
3 u |
11 u |
The number of grapefruits at first and in the end remains unchanged.
Number of starfruits added
= 11 u - 7 u
= 4 u
4 u = 36
1 u = 36 ÷ 4 = 9
Number of more starfruits than grapefruits in the end
= 11 u - 3 u
= 8 u
= 8 x 9
= 72
Answer(s): 72
