Will and Oscar had 188 staplers together. Will had 20 more staplers than Oscar. Both of them sold some of their staplers. Oscar sold 10% less staplers than what Will sold. In the end, Oscar had half as many staplers left as Will. How many staplers had Will left?
| |
Will
(1) |
Oscar
(2) |
Make p the same
(2)x2 = (3) |
Comparing Will
and Oscar at first |
20 more |
|
|
| Before |
104 |
84 |
168 |
| Change |
- 10 u |
- 9 u |
- 18 u |
| After |
2 p |
1 p |
2 p |
Number of staplers that Oscar had at first
= (188 - 20) ÷ 2
= 168 ÷ 2
= 84
Number of staplers that Will had at first
= 84 + 20
= 104
Number of staplers that Oscar sold in percent
= 100% - 10%
= 90%
90% =
90100 =
910 Make p the same.
(1) = (3)
104 - 10 u = 168 - 18 u
18 u - 10 u = 168 - 104
8 u = 64
1 u = 64 ÷ 8 = 8
Number of staplers that Will had left
= 104 - 10 u
= 104 - 10 x 8
= 104 - 80
= 24
Answer(s): 24
