Fill in the blanks.
The ratio of Bryan's stickers to Adam's stickers is 2 : 3.
After Bryan gives 90 stickers away,
The ratio of Bryan's stickers to Adam's stickers becomes 4 : 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 |
2 x 7 = 14 u |
3 x 7 = 21 u |
Change |
- 90 |
|
After |
4 x 3 = 12 u |
7 x 3 = 21 u |
(a)
Change ratio into units.
The number of stickers that Adam (2) has remains unchanged.
(b)
LCM of 3 and 7 = 21
Number of stickers that Adam has = 21 u
(c)
Change in the number of stickers that Bryan has
= 14 u - 12 u
= 2 u
(d)
Number of stickers that Bryan gives away = 90
2 u = 90
1 u = 90 ÷ 2 = 45
Answer(s): (a) 2; (b) 21; (c) 2; (d) 45