Fill in the blanks.
The ratio of Bryan's stickers to Adam's stickers is 3 : 4.
After Bryan gives 70 stickers away,
The ratio of Bryan's stickers to Adam's stickers becomes 5 : 9.
- 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 |
3 x 9 = 27 u |
4 x 9 = 36 u |
Change |
- 70 |
|
After |
5 x 4 = 20 u |
9 x 4 = 36 u |
(a)
Change ratio into units.
The number of stickers that Adam (2) has remains unchanged.
(b)
LCM of 4 and 9 = 36
Number of stickers that Adam has = 36 u
(c)
Change in the number of stickers that Bryan has
= 27 u - 20 u
= 7 u
(d)
Number of stickers that Bryan gives away = 70
7 u = 70
1 u = 70 ÷ 7 = 10
Answer(s): (a) 2; (b) 36; (c) 7; (d) 10