Nick and Eric had 62 files together. Nick had 14 more files than Eric. Both of them sold some of their files. Eric sold 25% less files than what Nick sold. In the end, Eric had half as many files left as Nick. How many files had Nick left?
| |
Nick
(1) |
Eric
(2) |
Make p the same
(2)x2 = (3) |
Comparing Nick
and Eric at first |
14 more |
|
|
| Before |
38 |
24 |
48 |
| Change |
- 4 u |
- 3 u |
- 6 u |
| After |
2 p |
1 p |
2 p |
Number of files that Eric had at first
= (62 - 14) ÷ 2
= 48 ÷ 2
= 24
Number of files that Nick had at first
= 24 + 14
= 38
Number of files that Eric sold in percent
= 100% - 25%
= 75%
75% =
75100 =
34 Make p the same.
(1) = (3)
38 - 4 u = 48 - 6 u
6 u - 4 u = 48 - 38
2 u = 10
1 u = 10 ÷ 2 = 5
Number of files that Nick had left
= 38 - 4 u
= 38 - 4 x 5
= 38 - 20
= 18
Answer(s): 18
