In a box, there are some pears and persimmons. If 35 more persimmons are put into the box, the percentage of pears will decrease from 75% to 40%. How many pears are there in the box?
|
Pears |
Persimmons |
Before |
3x2 = 6 u |
1x2 = 2 u |
Change |
No change |
+ 35 |
After |
2x3 = 6 u |
3x3 = 9 u |
75% =
75100 =
34 40% =
40100 =
25 The number of pears remains unchanged at first and in the end. Make the number of pears the same. LCM of 3 and 2 is 6.
Number of persimmons added
= 9 u - 2 u
= 7 u
7 u = 35
1 u = 35 ÷ 7 = 5
Number of pears
= 6 u
= 6 x 5
= 30
Answer(s): 30