Fill in the blanks.
The ratio of Adam's stickers to Bryan's stickers is 7 : 9.
After Adam gives 25 stickers away,
The ratio of Adam's stickers to Bryan's stickers becomes 1 : 2.
- Whose number of stickers has not changed? Give the answer in number. (Eg Adam = 1; Bryan = 2)
- Number of stickers that Bryan has = _____ u
- Change in the number of stickers that Adam has = _____ u
- 1 u = _____
|
Adam |
Bryan |
Before |
7 x 2 = 14 u |
9 x 2 = 18 u |
Change |
- 25 |
|
After |
1 x 9 = 9 u |
2 x 9 = 18 u |
(a)
Change ratio into units.
The number of stickers that Bryan (2) has remains unchanged.
(b)
LCM of 9 and 2 = 18
Number of stickers that Bryan has = 18 u
(c)
Change in the number of stickers that Adam has
= 14 u - 9 u
= 5 u
(d)
Number of stickers that Adam gives away = 25
5 u = 25
1 u = 25 ÷ 5 = 5
Answer(s): (a) 2; (b) 18; (c) 5; (d) 5