In a container, there are some oranges and mangosteens. If 200 more mangosteens are put into the container, the percentage of oranges will decrease from 70% to 30%. How many oranges are there in the container?
|
Oranges |
Mangosteens |
Before |
7x3 = 21 u |
3x3 = 9 u |
Change |
No change |
+ 200 |
After |
3x7 = 21 u |
7x7 = 49 u |
70% =
70100 =
710 30% =
30100 =
310 The number of oranges remains unchanged at first and in the end. Make the number of oranges the same. LCM of 7 and 3 is 21.
Number of mangosteens added
= 49 u - 9 u
= 40 u
40 u = 200
1 u = 200 ÷ 40 = 5
Number of oranges
= 21 u
= 21 x 5
= 105
Answer(s): 105