Diana had 300 coins. Billy had 14 of what Diana had. After Diana used some of his coins and Billy used 13 of his coins, Diana had 12 as many coins left as Billy.
- How many coins did Billy have at first?
- How many coins did Diana use?
| |
Diana |
Billy |
| Before |
300 |
75 |
| Change |
- ? |
- 25 |
| After |
25 |
50 |
(a)
Number of coins that Billy had at first
=
14 x 300
= 75
(b)
Number of coins that Billy used
=
13 x 75
= 25
Number of coins that Billy had left
= 75 - 25
= 50
Number of coins that Diana had left
=
12 x 50
= 25
Number of coins that Diana used
= 300 - 25
= 275
Answer(s): (a) 75; (b) 275
