Sabrina had 165 stamps. Luis had 25 of what Sabrina had. After Sabrina used some of his stamps and Luis used 16 of his stamps, Sabrina had 15 as many stamps left as Luis.
- How many stamps did Luis have at first?
- How many stamps did Sabrina use?
|
Sabrina |
Luis |
Before |
165 |
66 |
Change |
- ? |
- 11 |
After |
11 |
55 |
(a)
Number of stamps that Luis had at first
=
25 x 165
= 66
(b)
Number of stamps that Luis used
=
16 x 66
= 11
Number of stamps that Luis had left
= 66 - 11
= 55
Number of stamps that Sabrina had left
=
15 x 55
= 11
Number of stamps that Sabrina used
= 165 - 11
= 154
Answer(s): (a) 66; (b) 154