Fill in the blanks.
The ratio of Adam's stickers to Bryan's stickers is 9 : 7.
After Bryan gives 25 stickers away,
The ratio of Adam's stickers to Bryan's stickers becomes 2 : 1.
- Whose number of stickers has changed? Give the answer in number. (Eg Bryan = 1; Adam = 2)
- Number of stickers that Adam has = _____ u
- Change in the number of stickers that Bryan has = _____ u
- 1 u = _____
|
Adam |
Bryan |
Before |
9 x 2 = 18 u |
7 x 2 = 14 u |
Change |
|
- 25 |
After |
2 x 9 = 18 u |
1 x 9 = 9 u |
(a)
Change ratio into units.
The number of stickers that Bryan (1) has remains unchanged.
(b)
LCM of 9 and 2 = 18
Number of stickers that Adam has = 18 u
(c)
Change in the number of stickers that Bryan has
= 14 u - 9 u
= 5 u
(d)
Number of stickers that Bryan gives away = 25
5 u = 25
1 u = 25 ÷ 5 = 5
Answer(s): (a) 1; (b) 18; (c) 5; (d) 5