The ratio of pears to grapefruits is 3 : 4. If 20 grapefruits are added, the ratio of pears to grapefruits will be 3 : 8. How many more grapefruits than pears are there in the end?
| |
Pears |
Grapefruits |
| Before |
3 u |
4 u |
| Change |
|
+ 20 |
| After |
3 u |
8 u |
The number of pears at first and in the end remains unchanged.
Number of grapefruits added
= 8 u - 4 u
= 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Number of more grapefruits than pears in the end
= 8 u - 3 u
= 5 u
= 5 x 5
= 25
Answer(s): 25
