The ratio of grapefruits to pears is 5 : 7. If 50 pears are added, the ratio of grapefruits to pears will be 5 : 12. How many less grapefruits than pears are there in the end?
|
Grapefruits |
Pears |
Before |
5 u |
7 u |
Change |
|
+ 50 |
After |
5 u |
12 u |
The number of grapefruits at first and in the end remains unchanged.
Number of pears added
= 12 u - 7 u
= 5 u
5 u = 50
1 u = 50 ÷ 5 = 10
Number of less grapefruits than pears in the end
= 12 u - 5 u
= 7 u
= 7 x 10
= 70
Answer(s): 70