Fill in the blanks.
The ratio of Bryan's stickers to Adam's stickers is 1 : 4.
After Bryan gives 45 stickers away,
The ratio of Bryan's stickers to Adam's stickers becomes 1 : 7.
- Whose number of stickers has not 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 = _____
|
Bryan |
Adam |
Before |
1 x 7 = 7 u |
4 x 7 = 28 u |
Change |
- 45 |
|
After |
1 x 4 = 4 u |
7 x 4 = 28 u |
(a)
Change ratio into units.
The number of stickers that Adam (2) has remains unchanged.
(b)
LCM of 4 and 7 = 28
Number of stickers that Adam has = 28 u
(c)
Change in the number of stickers that Bryan has
= 7 u - 4 u
= 3 u
(d)
Number of stickers that Bryan gives away = 45
3 u = 45
1 u = 45 ÷ 3 = 15
Answer(s): (a) 2; (b) 28; (c) 3; (d) 15