In a box, there are some starfruits and passion fruits. If 60 more passion fruits are put into the box, the percentage of starfruits will decrease from 80% to 20%. How many starfruits are there in the box?
| |
Starfruits |
Passion fruits |
| Before |
4x1 =
4 u |
1x1 =
1 u |
| Change |
No change |
+ 60 |
| After |
1x4 =
4 u |
4x4 =
16 u |
80% =
80100 =
45 20% =
20100 =
15 The number of starfruits remains unchanged at first and in the end. Make the number of starfruits the same. LCM of 4 and 1 is 4.
Number of passion fruits added
= 16 u - 1 u
= 15 u
15 u = 60
1 u = 60 ÷ 15 = 4
Number of starfruits
= 4 u
= 4 x 4
= 16
Answer(s): 16
