Dylan had 132 starfruits and 63 mangosteens at first. He used
411 of the starfruits and
47 of the mangosteens. He then bought some more mangosteens. In the end,
18 of the fruits he had left were starfruits. How many mangosteens did he buy?
|
Starfruits |
Mangosteens |
Total |
Before |
132 |
63 |
|
Change 1 |
- 48 |
- 36 |
|
After 1 |
84 |
27 |
|
Change 2 |
|
+ some |
|
After 2 |
1 u |
7 u |
8 u |
Number of starfruits that Dylan used
=
411 x 132
= 48
Number of starfruits that Dylan had left
= 132 - 48
= 84
Number of mangosteens that Dylan used
=
47 x 63
= 36
Number of mangosteens that Dylan had left
= 63 - 36
= 27
Fraction of the fruits left that were mangosteens
= 1 -
18=
78 Number of starfruits left = 1 u = 84
Number of mangosteens left in the end
= 7 u
= 7 x 84
= 588
Number of mangosteens that Dylan bought
= 588 - 27
= 561
Answer(s): 561