In a box, there are some oranges and starfruits. If 22 more starfruits are put into the box, the percentage of oranges will decrease from 80% to 25%. How many oranges are there in the box?
|
Oranges |
Starfruits |
Before |
4x1 = 4 u |
1x1 = 1 u |
Change |
No change |
+ 22 |
After |
1x4 = 4 u |
3x4 = 12 u |
80% =
80100 =
45 25% =
25100 =
14 The number of oranges remains unchanged at first and in the end. Make the number of oranges the same. LCM of 4 and 1 is 4.
Number of starfruits added
= 12 u - 1 u
= 11 u
11 u = 22
1 u = 22 ÷ 11 = 2
Number of oranges
= 4 u
= 4 x 2
= 8
Answer(s): 8