Fill in the blanks.
The ratio of Bryan's stickers to Adam's stickers is 10 : 7.
After Adam gives 30 stickers away,
The ratio of Bryan's stickers to Adam's stickers becomes 8 : 5.
- Whose number of stickers has 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 = _____
|
Bryan |
Adam |
Before |
10 x 4 = 40 u |
7 x 4 = 28 u |
Change |
|
- 30 |
After |
8 x 5 = 40 u |
5 x 5 = 25 u |
(a)
Change ratio into units.
The number of stickers that Adam (1) has remains unchanged.
(b)
LCM of 10 and 8 = 40
Number of stickers that Bryan has = 40 u
(c)
Change in the number of stickers that Adam has
= 28 u - 25 u
= 3 u
(d)
Number of stickers that Adam gives away = 30
3 u = 30
1 u = 30 ÷ 3 = 10
Answer(s): (a) 1; (b) 40; (c) 3; (d) 10