Fill in the blanks.
The ratio of Adam's stickers to Bryan's stickers is 9 : 8.
After Bryan gives 60 stickers away,
The ratio of Adam's stickers to Bryan's stickers becomes 5 : 4.
- 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 5 = 45 u |
8 x 5 = 40 u |
Change |
|
- 60 |
After |
5 x 9 = 45 u |
4 x 9 = 36 u |
(a)
Change ratio into units.
The number of stickers that Bryan (1) has remains unchanged.
(b)
LCM of 9 and 5 = 45
Number of stickers that Adam has = 45 u
(c)
Change in the number of stickers that Bryan has
= 40 u - 36 u
= 4 u
(d)
Number of stickers that Bryan gives away = 60
4 u = 60
1 u = 60 ÷ 4 = 15
Answer(s): (a) 1; (b) 45; (c) 4; (d) 15