Japheth and Warren had 95 pens together. Japheth had 25 more pens than Warren. Both of them sold some of their pens. Warren sold 40% less pens than what Japheth sold. In the end, Warren had half as many pens left as Japheth. How many pens had Japheth left?
| |
Japheth
(1) |
Warren
(2) |
Make p the same
(2)x2 = (3) |
Comparing Japheth
and Warren at first |
25 more |
|
|
| Before |
60 |
35 |
70 |
| Change |
- 5 u |
- 3 u |
- 6 u |
| After |
2 p |
1 p |
2 p |
Number of pens that Warren had at first
= (95 - 25) ÷ 2
= 70 ÷ 2
= 35
Number of pens that Japheth had at first
= 35 + 25
= 60
Number of pens that Warren sold in percent
= 100% - 40%
= 60%
60% =
60100 =
35 Make p the same.
(1) = (3)
60 - 5 u = 70 - 6 u
6 u - 5 u = 70 - 60
1 u = 10
1 u = 10 ÷ 1 = 10
Number of pens that Japheth had left
= 60 - 5 u
= 60 - 5 x 10
= 60 - 50
= 10
Answer(s): 10
