In a box, there are some kiwis and mangosteens. If 66 more mangosteens are put into the box, the percentage of kiwis will decrease from 75% to 20%. How many kiwis are there in the box?
|
Kiwis |
Mangosteens |
Before |
3x1 = 3 u |
1x1 = 1 u |
Change |
No change |
+ 66 |
After |
1x3 = 3 u |
4x3 = 12 u |
75% =
75100 =
34 20% =
20100 =
15 The number of kiwis remains unchanged at first and in the end. Make the number of kiwis the same. LCM of 3 and 1 is 3.
Number of mangosteens added
= 12 u - 1 u
= 11 u
11 u = 66
1 u = 66 ÷ 11 = 6
Number of kiwis
= 3 u
= 3 x 6
= 18
Answer(s): 18